Question

Creator and destroyer exist in a computer game. Their total number is 16. Some try to build a wall around the palace and the rest to destroy it. Each builder can build a wall in 18 hours alone while any destroyer can destroy it in 15 hours. The wall is built in 2.5 hours when all 16 persons are activated before building the wall. Find the number of destroyers from these. (A) 6 (B) 5 (C) 3 (D) 4​

Answer 1

Answer:

It answer is <b> because of the there total no is 16