If 20 men working 7 hours a day can do a piece of work in 10 days, in how many days will 15 men working for 8 hours a day do the same piece of work?

Less man, more days

More Man, less days

For 20 men working 7 hors a day , number of man hours = 20×7=140

For 15 men working 8 hors a day , number of man hours =15×8=120

Given 20 men finishes work in 10 days, let 15 men takes x days

Therefore, 

Man  Working Hours  ::    Time taken

20          7            10

15          8             x

  • 3

IN 11.66DAYS

  • 0
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