1.

15 men can finish a piece of work in 40 days. The number of days after which 5 men should leave the work so that the work is finished in 45 days altogether is1. 102. 203. 304. 35

Answer» Correct Answer - Option 3 : 30

Given:

15 men can finish a piece of work in 40 days.

Number of men to leave the work = 5

Calculations:

Let the number of days after which 5 men left the work be y.

15  × 40 = 15y + (15 - 5) × (45 - y)

⇒ 600 = 15y + 10(45 - y)

⇒ 600 = 15y + 450 - 10y

⇒ 600 = 5y + 450

⇒ 150 = 5y

⇒ y = 30 days

∴ After 30 days 5 men should leave the work.



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