Question

a contractor employed 30 men to complete the project in 100 days. but later on he realized that just after 25 days only 20% of the work had been completed? how many men should be increased so that the work will be completed in 25 days less than the scheduled time?

Answer 1

Here, only 20% of the work had been completed in 25 days when 30 men are employed.

To complete the work 25 days before, we need to use the following formula:

M1*D1/W1=M2*D2/W2.

Now, according to the question, we have

30*25/20%=(x+30)*50/80% Here, we assume that x more men are increased to  complete 80% work left, 25 days before.

So, solving the above equation, we get:

x=30

Therefore, 30 more men should be increased to complete the work 25 days before the schedule time.

Answer 2

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