33.A takes twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2 days, can do the work alone in
A. 4 days B. 6 days
C. 12 days D. 15 days
Answer:
Suppose A,B and C take x,x/2 and x/3 hours respectively to finish the work.
Then, (1/x+2/x+3/x)
= 1/2
<=> 6/x=1/2
<=> 12.
So, B takes 6 hours to finish the work.
