IBPS SO Prelims Exam Model Paper 3

Given:
A can do a piece of work in 4 hours.
B and C together can do it in 3 hours.
A and C together can do it in 2 hours.
Concept Used:
Work done =

1

Time

Or
Work done = Efficiency × Time
Calculation:
A can do a piece of work in 4 hours.
A's 1 day work =

1

4

A and C together can do it in 2 hours.
(A + C)'s 1 day work = 1/2
C's 1 day work =

1

2

-

1

4

=

1

4

B and C together can do it in 3 hours.
(B + C)'s 1 day work =

1

3

Time taken by B to complete the work = 12 days