Question

23.

Answer 1

The number of days required to build a house by 4 men which is made by 5 men is 48 days is 60 days.

What is the relation between work and time?

The total time taken is inversely proportional to the rate of work. If a unit of work is done in total n number of days, then the total work done in a day can is,

W=(1/n)

It would take 48 days for 5 men to build a house. Thus, the work done by one man in one day is,

W=1/(48*5)

W=1/240

Thus, one man take 240 days to build a house. The time it takes when only 4 men works to build the house,

t=240/4

t=60

Hence, the number of days required to build a house by 4 men which is made by 5 men is 48 days is 60 days.

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