IBPS SO Prelims Exam Model Paper 8

Given:
Reservoir is filled by 3 inlets X, Y and Z = 10 hours.
Inlet X is twice as fast as Y
And Y is thrice as fast as Z
Calculation:
Let inlet Z alone take ‘a’ hours to fill the tank.
Z = a hours
Y take time to fill a reservoir =

a

3

hours
X take time to fill a reservoir = (

a

3

) × (

1

2

)
=

a

6

hours
Reservoir filled in 1 hour =
⇒ (

6

a

) + (

3

a

) + (

1

a

) = (

1

10

)
⇒

10

a

=

1

10

⇒ a = 100 hours
Z take 100 hours to fill a reservoir
Y take 33

1

3

hours to fill a reservoir.X takes 16

2

3

hours to fill a reservoir.