AFCAT Model Paper 5

Given:
A alone can complete a work in 22 days
B can complete the same work in 33 days
A left the work after 3 days of working together
Concept Used:
One day work of a worker =

1

n

Where, n = number of days to complete the work
Calculation:
One day’s work done by A=

1

22

One day’s work done by B=

1

33

Work done by (A + B) together in 1 day =

1

22

+

1

33

=

5

66

So, Work done by (A + B) together in 3 days =3×

5

66

=

5

22

Remaining work =1−

5

22

=

17

22

1 work completed by B = 33 days
Hence,

17

22

part of work completed by B=33×

17

22

=25.5 days