Math
posted by Apoorv
A does 20% less work than B .If a complete
a piece of work in 7& 1/2 hours then B can do it in
options 5,5&1/2,6,6&1/2
plz solve without using x and y method

Henry
B = 7.5  0.2*7.5 = 6h.
Respond to this Question
Similar Questions

Substitution MethodPlz help
Use the Substitution method to solve the system of equations. x + y = 4 x  y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=4 (y+2) + y = 4 solve for y. Then, x= y+2 i don't get it.How … 
maths, proportion
twelve men take 6 hours to finish a piece of work. after the 12 men have worked for 1 hour, the contractor decides to call in 8 more men to complete the remaining work. how many more hours would the 20 men take to complete the remaining … 
Math
Ok I need help to figure out how to solve this problem 4 working move into town looking for work. A local business offers them 200 hours of work. The catch is, they have to work the same number of hours as they do days. I.E. if they … 
arithmetic
A and B can complete a piece of work in 8 and 10 days respectively However they work alternately one day each with beginning the work In how much time will the work be completed? 
Mathematics
Twelve man take 6 hours to finish a piece of work. After the 12 men have worked for 1 hour, the contractor decides to call in 8 men so that the work can be completed earlier. How many more hours would 20 men take to complete the remaining … 
math
A man,a woman and a boy can complete a piece of work in 20,30 and 60 days respectively.How many boys should join 2 men and 8 women to complete the work in 2 days? 
math
A and B can do a piece of work in 12 days. They started to work together but A left after a few days. If B alone worked for 20 days, the whole work was finished in 24 days. How long would A take to complete the work? 
Math
One person can complete a piece of work in 8 days while other person can complete the same work in 4 days(if both works 10 hours per day). how many hours are required to complete the same work if both persons do it combined? 
mathsword problem help
A and B can finish a piece of work in 12days and 18days respectively. A begin to the work and they work alternately one at a time for one day each.The whole work will be completed in? 
Math HELP
2 boys and 5 girls can finish a piece of work in 4 days. 4 boys and 4 girls can finish the same work in 3 days. If a girl paid rs 750 each day, what may be the expenditure to complete the work?