If 9 men can reap 80 hectares in 24 days , then how many hectares can 36 men reap in 30 days? Choose the correct choice.
A) 127  B) 237  C) 387  D) 400  E) 481

Rationale: "explanation : let the required no of hectares be x . then men - - - hectares - - - days 9 - - - - - - - - - 80 - - - - - - - - - 24 36 - - - - - - - - - x - - - - - - - - - 30 more men , more hectares ( direct proportion ) more days , more hectares ( direct proportion ) x = 36 / 9 * 30 / 24 * 80 x = 400 answer : d"
Answer: D