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Question

If x men can do a piece of work in 5 days, then find the number of days that 20 men will take for the same work.

A
x6 days
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B
2x3 days
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C
x5 days
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D
x4 days
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Solution

The correct option is D x4 days
Given,
x men can do a piece of work in 5 days.

We know that if the number of men increase, then the number of days taken to finish the piece of work will be less.

So, Number of men(p)1Number of days(q)
p1p2 = q2q1

Given,
p1 = x men
p2 = 20 men
q1 = 5 days
and q2=No. of days taken by 20 men
x20 = q25
q2 = x×520
d2 = x4 days

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