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A man can do a certain task in 21 hours, another man can do the task in 28 hours and a boy can do the task in 48 hours. Find how long it will take to do the task if

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  1. Math

    A man can do a certain task in 21 hours, another man can do the task in 28 hours and a boy can do the task in 48 hours. Find how long it will take to do the task if all three work.
  2. algebra

    A man can do a certain task in 21 hours, another man can do the task in 28 hours and a boy can do the task in 48 hours. Find how long it will take to do the task if all three work.
  3. math

    it takes janet 9 hours to do a task and it take jancie 10 hours to do the same task how long will it take both of them to do the task together
  4. algebra

    A can do certain task in 8 hours, B in 10 hours and C in 12 hours. How long will it take to do the task if A and B work 1 hour and then A and C finish the task?
  5. math

    If A and B work together,they can finish a task in 2 hours. If they do the task separately, B can finish 3 hours earlier than A can. Find the time required for B to finish the task alone.
  6. Computer Science

    Mythical Man question: If it takes one person 3 months to complete a task, why does it take 4 people 6 months to complete the same task?
  7. Algebra

    Working​ together, Sarah and Jeff can do a task in 6 hours. Jeff uses a motorized cart to do the​ task, whereas Sarah uses a pushcart. If each person does the task without the help of the​ other, it takes Sarah twice as long as it takes Jeff. How
  8. Statistics

    Four people working independently on an assembly line all perform the same task. The time (in minutes) to complete this task for person i (i = 1, 2, 3, 4) has a uniform distribution on the interval [0, i]. Suppose each person begins the task at the same
  9. Exceptional children

    I need to do a task analysis on a self-care task that i usually do everyday.I need to find out all the diferent tiny skills that make up that one task that I don't think much about it.I could do it in 2 different ways, and each way will give me a better
  10. english

    In Scene 5, Frederick gets into a fight that lasts nearly 2 hours with Mr. Covey, his new "master." What kind of conflict is this? Question 2 options: Man versus nature Man versus self Man versus man Man versus society
  11. Statistics

    Four people working independently on an assembly line all perform the same task. The time (in minutes) to complete this task for person i (i = 1, 2, 3, 4) has a uniform distribution on the interval [0, i]. Suppose each person begins the task at the same
  12. college algebra

    Find the time for 2 people working together to complete half of a task if it takes them 8 hours and 10 hours to complete the entire task working individually. Thank you!!!
  13. college algebra

    Find the time for two people working together to complete half a task if it takes them 8 hours and 10 hours to complete the entire task working individually.
  14. Maths

    a task of 30 man days was done by group of men in 5 days. if total salary paid to all of them was rs. 36000 Whats the salary paid for one man Urgent
  15. english

    I have to conduct a team task anaylsis, cognitive task analysis and task analysis of my job as being a student? Im not sure how to do this. I have already thought of all related behaviours and duties for each but again can anone give me an example? or
  16. Math

    Plz help me understand this. I need to know how to do it. It took Khalid 90 minutes to complete 40 tasks. Which answer choice is an equivalent rate? A). 10 task in 0.9 minutes B). 10 task in 2.25 minutes C). 10 task in 9 minutes D). 10 task in 22.5 minutes
  17. math

    if wayne completed a task in one hour and sarah completed a task in two hours, how long will they take if they work together?
  18. Physics

    A particular task exposes the operator to alpha radiation at an average dose of 200 ìGy each time the task is performed. If the company needs the task performed once per day over a 250-day working year and the maximum occupational dose limit is 20mSv per
  19. Radical and Rational exponents

    Estimate how long it takes you to complete a task of your choice (house cleaning, mowing, etc.) in a given week. Suppose that Joe is slower than you at the given task and takes three times as long as you do. If you work together, how long would it take you
  20. algebra

    A man (we'll refer to him as man 1) starts from his home at 8 A.M. and drives a steady rate of 50 MPH. An hour later a second man ( man 2) starts to follow him. Draw a graph to represent these facts. From the graph find when man 2 overtakes man 1. Okay, I
  21. Assistance Dogs

    Please check my answer thanks:) After a dog learns to perform a specific task, the task must then be generalized to various locations. The task must then be _______, so that the dog is able to perform the response despite any distractions such as crowds,
  22. physics

    This is an example question which I have the answer to but can not seem to get the same answer through my workings, any help with the equation would be great. A particular task exposes the operator to alpha radiation at an average dose of 200 ìGy each
  23. math

    need to check answers please 9/11-3/11+7/11=13/11=1 2/11 evaluate then to lowest form One task took 7 minutes (min), a second task took 12 min, and a third task took 21 min. How long did the three tasks take, as a fraction of an hour?2/3 find perimeter of
  24. Science...ANSWER ASAP

    i've lost my task sheet and i can't find it online. but my other class mates have managed to find it. I cant get hold of them as it's bank holiday monday. my homework is due in first thing. my task sheet is called: 9G task sheet (L5-7) please help..it hass
  25. Criminology

    Which traits are shared by most task forces? There may be more than one correct answer. Be sure to select all that apply. ANSWER: - task forces work across jurisdictions - task forces require different kinds of expertise
  26. English

    In Call of the Wild, when John Thornton threatens against Hal against beating Buck any further, the conflict can best be described as a. man vs. man*** b. man vs. himself c. man vs. nature d. man vs. society
  27. english help please!!

    When Marilyn Cross is trapped, what kind of conflict does the pilot create for her? Man vs. Man Man vs. Society Man vs. Self Man vs. Nature
  28. english help please!!

    A character has a personal fear or an emotional struggle. What kind of conflict is this? Man vs. Man Man vs. Nature Man vs. Self Man vs. Society is it c
  29. AED

    Can anyone give me suggestions on the following information that will help me please.. Choose a disruptive or off-task behavior that is routinely displayed in a classroom. • Prepare a 10-minute role-playing script based on the off-task or disruptive
  30. Math

    A team of workers took 167.3 hours to complete a task. A smaller team of workers will computer the same task, but it will take them 1.25 times as long as it took the first team based on this information, which statement is true
  31. direct and indirect guidance

    Jenny's mom handed her a block and told her, "Here, Jenny. Take the block." Jenny's mom has asked for _______ compliance. A. task B. attentional C. contact D. threatening My answer between C and A. C is because mom makes a direct contact. Or A. mom gives a
  32. math

    one task takes 7 mins second task takes 12 min third task takes 21 nin how long dids the 3 tasks take, as a fraction of a hour 7/30+12/30+21/30=40/30 =1 1/3 hr is that right? no 2/3 Prinness is correct. There are 60 minutes (not 30) in an hour. So -- your
  33. Math/Management

    Ten jobs are to be completed by three workers (Sam, Joy, and Kelly) during the next week. Each person works a 40-hour week and is paid an hourly rate: Sam, Joy, and Kelly earn $11, $13, and $14 per hour, respectively. Union rules require workers to be
  34. MATH

    An application of a rational function is T = (AB)/(A+B), which gives the time, T, it takes for two workers to complete a particular task where A & B represent the time it would take for each individual worker to complete the identical task. Estimate how
  35. Intergated chemistry/physics

    A 200 man is running 3 miles per hour and collides with a 125 pound man. If the larger man transfers all of his momentum to the smaller man, will the smaller man travel slower, faster or at the same speed as the larger man?
  36. help please

    sarah sets aside time every night to read some pages in her history book. She schedules a break into her study time. why is this not an effective study plan ? A. The task is irrelevant to her priorties. B. The task is not realistic for the time she has set
  37. Homework

    Sarah sets aside time every night to read some pages in her history book. She schedules a break into her study time. Why is this not an effective study plan? A. Her scheduled break is not long enough. B. The task is not concrete or specific enough. C. The
  38. Reading

    Sarah sets aside time every night to read some pages in her history book. She schedules a break into her study time. Why is this not an effective study plan? A. Her scheduled break is not long enough. B. The task is not concrete or specific enough. C. The
  39. statistics

    On a standard anagram task, people successfully complete an average µ=26 anagrams with a standard deviation=4. This distribution is normal. A researcher would like to demonstrate that the arousal from anxiety is distracting and will decrease task
  40. college maths

    Suppose that you have been asked to take over as a project manager on a small construction project which has been decomposed into 7 tasks – activities. Let Qi be the quantity of work for task i (expressed in labor days/machine days/ days needed to
  41. Business

    What job enrichment practices does Nestle follow regarding: task identity task significance autonomy
  42. Algebra 2

    Task: Come up with a new linear function that has a slope that falls in the range -1
  43. HIstory

    Why did congress feel that construction was a confessional task and not a presidential task?
  44. mathematics

    A team of workers took 167.3 hours to complete a task. A smaller team of workers will complete the same task, but it will take them 1.25 times as long as it took the first team. Based on this information, which statement is true?
  45. math

    I know this is not on anyone else because it's my fault but, i need help writing 2 paragraphs. Task 3 Greece is currently experiencing a financial crisis. a. Research the financial crisis in Greece and summarize it in one-two paragraphs. It's currently
  46. Essay

    I have to finish the final draft of my essay on Huck Finn, and I have some good ideas and I know what I want to say, but I need some ideas on the creativity part of it. I can't exactly think of an interesting grabber or some more creative things. Here is
  47. English

    In Achebe's "Chike's School Days" what was the diviner called? A. "The man with the tortoise shell" B. "The man with four eyes" C. "The man who talked to water" D. "The man who knows all"
  48. new physics

    a man leaves his house for 2 hours. after walking in a straight line for two hours he is 10 miles from home. calculate the man's average speed in terms of miles per hour.
  49. physics

    A man leaves his house and begins to walk for 2 hours. After walking in a straight line for two hours he is 10 miles from home. Calculate the man's average speed on terms of miles per hour.
  50. math

    If a job can be done by 10 workers in 5 hours, the work load is 10(5) = 50 man-hours. If 4 workers is doing the job for 6 hours, the work done is 4(6) = 24 man-hours. A remaining of 50 - 24 = 26 man-hours of work still needs to be done. Problem Eleven men
  51. Math

    Here men were invited to lunch one day. The host places them in a line on three chairs. The men are positioned in such as way that Man #3 can see both Man #1 and Man #2 , Man #2 can see only Man # 1 , and Man #1 can see none of the other men. The host then
  52. english

    if a task description is to write an essay what is a goal?( in a language learning diary) and if a task desription is to learn some theory for an exam what is a goal?
  53. science

    a man walks 7km in hours and 2 km in 1 hour in the same direction. what is the man's speed for the whole journey
  54. Computer science

    Write a short response detailing which daily task you chose, and the high level and low level instructions to complete that task. Can someone give me an example, I'm not understanding this.
  55. computer

    Object-Oriented Data and Processes • Identify a task you perform regularly, such as cooking, mowing the lawn, or driving a car. • Write a short, structured design (pseudocode only) that accomplishes this task. • Think about this task in an
  56. operation management

    A firm is planning to set up an assembly line to assemble 40 units per hour. Assume that 57 minutes per hour are productive. The time to perform each task and the tasks preceding each task are as follows: Task Preceding Task Time to Perform (Min) A - 0.69
  57. business statistics

    For one of the tasks in a manufacturing process, the mean time for task completion has historically been 35.0 minutes, with a standard deviation of 2.5 minutes. Workers have recently complained that the machinery used in the task is wearing out and slowing
  58. British literature

    from the dramatic monologue the reader learns that the duke is a: A.loving man B.talented artist C.generous man D.self-obsessed cruel man I put b. Talented man
  59. English-Ms. Sue

    So for my second paragraph how would I start it off? -Describe not just how a man looks like, but what he values, and how he behaves. This time am I not describing a man from my point of view? Am I describing a man like, a man can be abusive, or nice, etc.
  60. arithmetic

    How do I get hours to perform task I have a rate of 28 per hour and 6245 transactions how many hours to complete
  61. Lesson 6 Principles of Management

    According to the job characteristics model, skill variety, task identity, and task significance combine to affect: knowledge of results, meaningfulness of work, responsibility for results, autonomy
  62. mathematics

    A gardener has the task of digging an area of 800 metres per square. On the first day he digs an area of 10 metres per square. On each successive day he digs an area of 1.2 times the area that he dug the previous day, until the day when the task is
  63. two dimensional kinematics

    A freight train is moving at a constant speed of Vt. A man standing on a flatcar throws a ball into the air and catches it as it falls. Relative to the flatcar, the initial vellocity of the ball is Vib straight up. a. What are the magnitude and direction
  64. English

    Why did the nightly knocking at the temple finally stop in “Old Man of the Temple” by R. K. Narayan? A. The narrator helped the old man find his way to his wife. B. They drove the old man out of town, so he wouldn’t bother the temple anymore. C. The
  65. Physics

    A man jumps straight up at 5m/s. a. Determine the time the man is in the air. b. Determine the maximum height the man would reach. c. As he jumps, a jerk pushes him in the back, giving him a velocity of 12m/s. determine the range of the man. d. Solve for
  66. Maths

    cottage firm employed 5 men and 9 women to make two types of articles P and Q. A man takes 2 hours, while a woman takes 3 hours to make one unit of article P and a man takes 1 hour, while a woman takes 2 hours to make one unit of article Q. A man and a
  67. Physical Science

    A man jogs 8 km/h for 5 hours. How far did the man jog?
  68. Algebra

    One person can complete a task in 3 minutes. A second person can complete the same task in 5 minutes. How long will it take to complete the task of the two people work together?
  69. maths

    A man goes upstream for a distance of 10 kms in 5 hours. Another man goes downstream the same distance of 10 kms in 3 hours. what is the difference in speeds of two men if the river speed is 0.5 km/hr
  70. economics

    The production function for our Production is Q = 25L - 0.05L^2; where Q is output and L is man-hours. What level of man-hours will maximize total output?
  71. history

    The task of economic policy is to create a prosperous America. The unfinished task of prosperous Americans is to build a Great Society. Our accomplishments have been many; these tasks remain unfinished
  72. social studies

    The task of economic policy is to create a prosperous America. The unfinished task of prosperous Americans is to build a Great Society. Our accomplishments have been many; these tasks remain unfinished:
  73. English

    I can re-word these two separate things. I found them on the internet but need to change the words. Any help would greatly be appreciated. "I believe that I deserve this scholarship because I put so much effort into every task that I am given. I give only
  74. Fine Art 7 - Dr. King Letter (to share)

    Dear Dr. King. You was a brave man. A man who do whatever it takes to stop Civil Rights. A man with a beautiful wife and family. A man who became the public face of a movement. A man who tirelessly worked, marched, got arrested, spoke on the topics of
  75. Statistics

    An experiment was designed to test a hypothesis that stated that high-drive subjects would be able to learn a simple task much more quickly than would low-drive subjects. The hypothesis further state that on a difficult task the opposite would be found –
  76. uhh help

    the legendary king midas was a: a.very beautiful b.very rich man c.very wise man d.very brave man i choose c??
  77. Clinical Calculations

    Suppose that the adult dosage for a given medication is 150 milligrams​ (mg) per day for every 9 kilograms​ (kg) of body weight. ​a) At this rate find the daily dose for a man who weighs 117 kg. ​b) If the man is to receive 500 mg of this
  78. English

    1. What was the old man’s lie? 2. You promised me a bag of gold. 2-2. It was that you promised me a bag of gold. 2-3. It was you promised me a bag of gold. 2-4. It was, you promised me a bag of gold. 2-5. It was, "You promised me a bag of gold." [Which
  79. Math

    1. In order to collect data on the signal strengths in a neighborhood, Briana must drive from house to house and take readings. She has a graduate student, Henry, to assist her in the task. Briana figures it would take her 12 hours to complete the task if
  80. English

    "A fearful man, all in coarse gray, with a great iron on his leg. A man with no hat, and with broken shoes, and with an old rag tied round his head. A man who had been soaked in water, and smothered in mud, and lamed by stones, and cut by flints, and stung
  81. Algebra 1 A

    I need some help with my Algebra project. I already finished task on but I'm unsure of how to solve my inequality. Please help. Task 1 Summary: You are going to decide on a summer business to start. Figure out what you will do, how much it will cost you,
  82. Algebra

    Solving Inequalities Portfolio – Unit 4 Make sure you answer each part of each task. Label each answer with the letter that corresponds to it. Task 1 You can pick any amount of money you want to invest, but keep it logical. I doubt if you have 1 million
  83. English 12

    I need help on paraphrasing "No man is an Island" No man is an island entire of itself; every man is a piece of the continent, a part of the main; if a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as a manor
  84. algebra

    four men qant to cross a bridge. they all begein on the same side. its night and they only have one flash light with them. at most two men can cross the bridge at the same time,and any party who crosses, either one or two people musy have a flashlight wit
  85. Physics

    A man cycles up a hill whose slope is 1in20. If themass of the man and the cycle is 150kg and the man covers a distance of 100m along the incline, calculate the work done by theman.
  86. calculus

    A 160-lb man carries a 25-lb can of paint up a helical staircase that encircles a silo witha radius of 20 ft. If the silo is 90 ft high and the man makes exactly three complete revolutions, how much work is done by the man against gravity in climbing to
  87. General(dont know actual subject)

    My project is research based... I chose plastic surgery.... Question is: why have you chosen this task? ( in the box below write a paragraph explaining why you have selected your particualar task idea.) I really cant think of why i chose plastic surgery
  88. Career prep

    Which of the following is true about careers? is it possible for a person to have the same job title but do completely different task? is it typical for a person to only be responsible for performing one or two task of work ? is it unusual for a person to
  89. physics

    a 60kg man is on a steadily rotating Ferris wheel. the man is standing on a bathroom scale and the scale reads 45kg at the top of the wheel. take g=10m/s^2 (a) what does the scale read when the man is at the bottom of the wheel? (b)what does the scale read
  90. Statistics -- Probability

    I need to calculate P(man is a ballet dancer and a musical performer) given the following information... In a random sample of male and female graduates of the New York School for the Arts between the ages of 22-35 you know that: the probability a man is a
  91. Science

    [I choose b.] Why are there so many species still unknown to modern science? a.many of these species are found in remote environments. b.smaller species receive less attention than large organisms. c.Cataloging these species is a huge task d.all the above
  92. Business Management

    The Environmental Protection Agency administers environmental standards in the U.S. EPA represents the what, and of what organizations? A.local communities; task environment B.finiancial institutions; internal environment C.government regulators;task
  93. Literature HELP!!!

    Which phrase best describes Samuel Pepys's personality, judging from the Diary excerpts you read? A.a caring, social man with many friends B. a hardworking but miserly man who cares only about the damage the fire will cause his properties C.an angry and
  94. Riddle

    The man who made it sold it.. the man who bought it never used it.. and the man who used it never saw it and he was not blind?
  95. Physics

    A 70 kg man just before contact with the ground has a speed of 5 m/s In a stiff-legged landing he comes to a halt in 7ms (miliseconds). Keeping in mind that the average net force acting on the man includes both the force of the ground on the man and the
  96. Physics

    A 70 kg man just before contact with the ground has a speed of 5 m/s In a stiff-legged landing he comes to a halt in 7ms (miliseconds). Keeping in mind that the average net force acting on the man includes both the force of the ground on the man and the
  97. Physics

    A 70 kg man just before contact with the ground has a speed of 5 m/s In a stiff-legged landing he comes to a halt in 7ms (miliseconds). Keeping in mind that the average net force acting on the man includes both the force of the ground on the man and the
  98. Physics

    A 70 kg man just before contact with the ground has a speed of 5 m/s In a stiff-legged landing he comes to a halt in 7ms (miliseconds). Keeping in mind that the average net force acting on the man includes both the force of the ground on the man and the
  99. Physics (please help!!!!)

    A man standing on a frictionless ice throws a boomerang which returns to him. Asuuming that the boomerang can only move in a a circular path, choose the correct statement: A)Since the momentum of the man-boomerang system is conserved, the man will ocme to
  100. Physics please help

    A man standing on a frictionless ice throws a boomerang which returns to him. Asuuming that the boomerang can only move in a a circular path, choose the correct statement: A)Since the momentum of the man-boomerang system is conserved, the man will ocme to

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