math

8 workers together at the same rate finished a painting job in 5 hours. hour long would it take 12 such workers working at the same rate to finish the same job? each worker finished____(fraction) of the job in one hour. 12 workers finished_____(fraction) of the job in one hour, they finished the job in_____hours

Simple.
it takes 40 'workerhours' to do the job.

so if 12 'workers' do it, it would take 40/12 hours or 3 hours and 20 minutes.

  1. 👍 0
  2. 👎 1
  3. 👁 201

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    My son is doing this in 6th grade math class. Mr. Weiss started painting the kitchen at 8:45 am and finished painting at 12:00 pm. About how many hours elapsed between the time he started painting and the time he finished painting

    asked by m on October 6, 2011
  2. algebra

    It takes 7 hours for Isabella to rake leaves by herself.Her brother can work 3 times as fast.if they work together,how long will its take them to rake leaves? My answer: Isabella can do one job in 7 hours (1/7in one hour).Matthew

    asked by Anneliese on May 29, 2017
  3. Algebra

    Two plumbers received a job. At first, one of the plumbers worked alone for 1 hour, and then they worked together for the next 4 hours. After this 40% of the job was finished. How long would it take each plumber to do the whole

    asked by Hansel on April 5, 2016
  4. math

    A man can paint a fence in 8 hours. Another man can paint that fence in only 7 hours. A third man can paint that fence in only 5 hours. How long will it take for all three men to paint the fence? in one hour, man1 can paint 1/8 of

    asked by bob on December 5, 2006
  5. math

    1.a collection of 105 coins consists of 1 peso and 5 pesos. if the total value is 205 pesos, find the number of coins of each denomination in the collection. 2.leslie's wallet contains 20 peso bills and 1 peso coins with a total

    asked by faye on January 15, 2011
  6. Math!!

    You work in retail. In the past you inventoried and shelved the weekly UPS shipment in 2 hours. Your co-worker usually takes 3 hours to do the UPS shipment. How long will it take the two of you working together to finish this

    asked by Urgent Urgent!! on February 24, 2013
  7. Math

    If Sally can paint a house in 4 hours, & John can paint the same house in 6 hours, how long will it take for both of them to paint the house together? ' I am having trouble remembering how to set up the equation? Amount of work

    asked by Katie on March 5, 2007
  8. Algebra class!

    WEEK 5 - Work Rates You work in retail. In the past you inventoried and shelved the weekly UPS shipment in 2 hours. Your co-worker usually takes 3 hours to do the UPS shipment. How long will it take the two of you working together

    asked by Lisa Urgent Math!! on February 24, 2013
  9. 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

    asked by zeff on October 9, 2016
  10. Math

    John has two part time jobs. He works no more than 40 hours per week. He earns $6 per hour from the first job and $8 per hour from the second job. To cover his expenses, he needs to earn at lease $210 per week. Which of the

    asked by Shadia on May 14, 2012

More Similar Questions