IBPS SO Prelims Exam Model Paper 9

Given:
Inlet D is four times faster than E.
Inlet E is twice as fast as F.
Calculation:
Let inlet F alone take a hours to fill a reservoir.
⇒ E =

a

2

hours
⇒ D = (

a

2

) × (

1

4

) =

a

8

hours
According to the question,

8

a

+

2

a

+

1

a

=

1

11

⇒

(8+2+1)

a

=

1

11

⇒

11

a

=

1

11

⇒ a = 121 hours
∴ Time taken by inlet F is 121 hours.
Time taken by inlet E is 60.5 hours.