If 5 men undertook a piece of construction work and finished half the job in 15 days. If two men drop out, then the job will be completed in Select:
A) 5 days  B) 15 days  C) 10 days  D) 25 days  E) 20 days

Rationale: that is , half the work done = 5 * 15 * 1 / 2 then , 5 * 15 * 1 / 2 = 3 * ? * 1 / 2 i . e . 5 * 15 = 3 * ? = 5 * 15 / 3 = 25 day d
Answer: D