IBPS Clerk Prelims Model Paper 15

Sahay can complete a job = 21 days
Mahanath can complete a job
=

21

2

days
Sahay can do a work in 1 day =

1

21

Mahanath can do a work in 1 day =

2

21

Both work in 1 day =

1

21

+

2

21

=

1+2

21

=

3

21

=

1

7

Both will complete a work in 7 days.