Question

A works twice as fast as B and B works twice as fast as C. If A and B together complete a
work in 4 days, then C alone can complete the work in
(A) 8
(B) 6
(C) 24
(D) 12​

Answer 1

Step-by-step explanation:

Answer

Ratio of rates of working of A and B = 2 : 1.

So, ratio of times taken = 1 : 2.

B's 1 day's work =

12

1

∴A's one day's work=

6

1

(2 times the work of B)

(A+B)'s one day's work=

6

1

+

12

1

=

12

3

=

4

1

So,A and B together can finish the work in 4 days.