A, B, C can together complete the work in 12 days. If A is thrice faster than B, and B is twice faster than C, B alone can do the work in:
A24 days
B48 days
C54 days
D42 days
Answer:
C. 54 days
Read Explanation:
Let the efficiency of C be x, then
Efficiency of A = 6x
Efficiency of B = 2x
Efficiency ratio of A, B and C = 6 : 2 : 1
Total work = 12 × (6 + 2 + 1) = 12 × 9 = 108
B alone can complete the whole task in = 108/2 = 54 days