Question

17. If 20 men can do a piece of work
in 35 days, 14 men can finish the work
in
(a) 40days
(b) 65days
(c)55days
(d) 50days.​

Answer 1

• 20 men take 35 days

• So 1 man will take (35*20) = 700 days. ( Its obvious that 1 man will take more days so simply multiply to get days taken by 1 man)

• Now, 14 men will take 700/14 = 50 days. ( Its again obvious that when we increase the number of people then the work will be done faster in less days and so we divided)

• This is a case of inverse proportionality where a decrease in one quantity leads to increase in other quantity and the increase in oje quantity leads to decrease in the other. As you can see that if number of men increases then days decreased and if men decrease so days increase. Whenever you see such case, simply follow the rule…First multiply then divide.

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