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A man riding a bicycle, completes one lap of a circular field along its circumferenceat the speed of 79.2 km/hr in 2 minutes 40 seconds. What is the area of the filed ?W 985600 sq metre2) 848500 sq metre3) 795600 sq 'metre4) Cannot be determined5) Other than those given as options |
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Answer» 985600 sq metre the answer speed= 79.2 km/hr = 22 m/stime= 2 min 40 s = 160 sdist= speed x time2 x 22/7 x r = 22 m/s x 160 sr= 22 x 160 x 7/22 x 1/2r= 560m [ radius ] Area: (22/7 * r²) 22/7 * 560 *560 = 985600 m² [ans.] (1) is correct option 5) is the correct answer The correct answer is 985600 The correct answer is no 1 |
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