A right elliptical cylinder full of petrol has its widest elliptical side 2.4 m and the shortest 1.6 m. its height is 7 m. find the time required to empty half the tank through a hose of diameter 4 cm if the rate of flow of petrol is 120 m/min
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"In this question, we have area of the ellipse = 3.14 * 1.2 * 0.8
The volume of the half of tank = 3.14 * 1.2 * 0.8 * 7 * 0.5 = 10.55 m3
Area of the hole through which water exits = 3.14 * 0.042 / 4 = 0.00125
Volume of the flow through the hole = 0.00125 * 120 = 0.15 m3/min
Time = 10.55 / 0.15 = 70 min
"
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