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