Question
A man riding a bicycle, completes one lap of a circular field along its circumference at the speed of 73.2 kmph in 2 minutes 40 seconds. What is the area of the field ?
Answer: Option A
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Circumference of circular field = (79.2 * 5/18 * 160) metre
= 3520 metre
∴ 2πr = 3520
=> 2 * 22/7 * r = 3520
=> r = (3520*7)/(2*22) = 560 metre
∴ Area of the field
= πr2 = 22/7 * 560 * 560
= 985600 sq.metre
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