Chain Rule Practice Test 1 with solutions

Question : 30 of 40

Marks: +1, -0

A contractor undertook to complete a project in 90 days and employed 60 men on it. After 60 days, he found that

3/4

of the work has already been completed. How many men can he discharge so that the project may completed exactly on time?

Solution:

Work	Days	Men
3/4	60	60
1/4	30	x

⇒

x/{60}

{60}/{30} × {1/4}/{3/4}

∴ x =

{60}/{30} × 1/3 × 60

= 40 days

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