A cylindrical tank of radius 14 cm is full of water. If 616 litres of water are drawn out, then the water level in the tank is dropped by _________ m. (Take π = )
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Correct answer: D
Explanation
The correct answer is Option 4 i.e. 10.
Volume = 616 liters
On changing into cm3
Volume = 616 × 1000
We know that,
Volume of the cylinder = πr2h
here, r = radius, h = height of the tank
⇒ 616 × 1000 = 22/7 × 142 × h
⇒ 28 × 1000 = 1/7 × 142 × h
⇒ 2 × 1000 = 1/7 × 14 × h
⇒ 2 × 1000 = 2 × h
⇒ h = 1000 cm2
⇒ h = 1000/100 = 10m2