Question

A can do as much work as B and C together can do. A and B can together do a piece of work in 9 hours 36 minutes and C can do it in 48 hours. The time (in hours) that B needs to do the work alone, is : 

(a) 18 hrs 

(b) 24 hrs 

(c) 30 hrs 

(d) 12 hrs

Answer 1

Correct option (b) 24 hrs

Explanation:

According to questions,

(A+B+C)’s efficiency = 6 units/day According to question, A should do half of the work alone as another half work is done by B and C together.