30 men can complete a work in 12 days. After 6 days, 24 more men joined them. How many days will they now take to complete the remaining work?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 3 days.
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
⇒ (30 × 6) = (54 × D2)
⇒ D2 = 10/3 = 3 days