IBPS Clerk Prelims Model Paper 18

Full job done by Praful in 60 days
Left job = 1−

1

2

=

1

2

1

2

job is completed by Sarabjit = 10 days
Full job is completed by Sarabjit
= 10 × 2 = 20 days
Both’s 1 day’s job
=

1

60

+

1

20

=

1+3

6

=

4

60

=

1

15

Time taken by both
=

1

1 15

days = 15 days