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Time taken to fill a water tank of size 2 m × 1.5 m × 1 m, by a tap with speed 20 litre/minute, is
Question

Time taken to fill a water tank of size 2 m × 1.5 m × 1 m, by a tap with speed 20 litre/minute, is

A.

9 minutes

B.

1 hour 30 minutes

C.

60 minutes

D.

2 hours 30 minutes

Correct option is D

The volume of the water tank = 2m x 1.5m x 1m
= 3 m3
= 3000 litre
Time to fill the tank = 3000/20 = 150 minutes = 2 hours 30 minutes

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