Question

Water flows into a tank which is 200 m long and 150 m wide, through a pipe of cross-section (0.3m x 0.2m) at 20 km/h. In what time will the water level be 12m ?
A) 200 hrs
B) 240 hrs
C) 300 hrs
D) 270 hrs

Answer 1

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Answer 2

Hey mate ^_^

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Answer:
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Volume of water collected in the tank in 1 hour.

So,

$(0.3 × 0.2 × 20km × 1000mts) = 1200 m^3$

If after t hours, the water is at height of 12m.

So,

$1200t = 200 × 150 × 12$ 

$1200t = 360000$

$t = \frac{360000}{1200}$

$t = 300 Hours$

Therefore,

Correct option C) 300 Hours.

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