IBPS SO Prelims Exam Model Paper 6

Given:
A can do work in 28days
B can do work in fortnights
Fortnight is a unit of time equal to 14 days
Formula:
Work = Efficiency × time
Efficiency =

Work

Time

Calculation:
A’s efficiency =

1

28

B’s efficiency =

1

14

⇒ Number of days to complete the work by A and B together =
⇒[

1

( 1 28 + 1 14 )

]
⇒

1

( 3 28 )

⇒

28

3

days
⇒ 9

1

3

days
∴ A and B together to complete the work in 9

1

3

days.