Question
A cylindrical tank of radius 7 meters and height 10
meters is filled with water. Water is pumped out at the rate of 50 cubic meters per minute. How long will it take to empty the tank completely?Solution
Volume of the tank = πr²h = (22/7) × 7² × 10 = 1540 cubic meters Time to empty the tank = Volume / Rate = 1540 / 50 = 30.8 minutes Correct answer: a) 31 minutes (rounded up).
The Marginal cost of production of a commodity is
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National Income is theÂ
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