Q. 63 5 skilled workers can build a wall in 20 days; 8 semi-killed worker can build a wall in 25 days; 10 unskilled workers can build a wall in 30 days. If a team has 2 killed, 6 semi-killed and 5 unskilled workers, how long will it take to build the wall
(A) 20 days
(B) 18 days
(C) 16 days
(D) 15 days
Answer: D
Explanation:
