24 men complete a work in 9 days. 3 days after they started working, 8 more men joined them. How many days will all of them take to complete the remaining work?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 4.5.
Total work = 24 × 9 = 216 days
The remaining work will be completed in x days
⇒ 24 × 3 + 32 × x = 216
⇒ 72 + 32x = 216
⇒ 32x = 216 - 72
⇒ 32x = 144
⇒ x = 144/32 = 4.5 days