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  1. A contractor undertook to finish a work in 92 days and employed 110 men. After 48 days, he found that he had already done 3/5 part of the work, the number of men he can withdraw so that the work may still be finished in time is :
    1. 45
    2. 40
    3. 35
    4. 30
Correct Option: D

Using Rule 1,

M1D1
=
M2D2
W1W2

110 × 48
=
M2 × 44
3
2
55

⇒ M2 × 44 × 3 = 110 × 48 × 2
⇒ M2 =
110 × 48 × 2
= 80
44 × 3

∴ Number of men can be withdrawn
= 110 – 80 = 30



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