10 men can do a work in 25 days. After 12 days of work, 3 more men were engaged to finish the work. The number of days required to complete the remaining work is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 10.
If M1 persons can do W1 work in D1 days and M2 persons can do W2 work in D2 days,
Then,
⇒ (M1 × D1)/W1 = (M2 × D2)/W2
⇒ 10 × 13 = 13 × D2
⇒ D2 = 10 days