A and B can do a piece of work in 15 days. B and C together can do it in 9 days. If C is twice as good as a workman as A, find in how many days B alone can do the work?
Answer & explanation
Correct answer: option 3
ATQ,
Efficiency : C : A = 2 : 1 = 4 : 2
No, Efficiency ratio:
A : B : C = 2 : 1 : 4
Time taken by B = \(\frac{45}{1}\) = 45 days