A car running with a speed of ‘x’ m/sec makes 5 rounds of a circular field having radius 42 metres, in 10 seconds. Find the time taken by car to cover 300 metres with the speed of (x – 32) m/sec.
Distance covered by the car = 5 × 2πr = 2 × (22/7) × 42 × 5 = 1320 metres Speed of the car = 1320/10 = 132 m/sec Required time taken = 300/ (x – 32) = 300/100 = 3 seconds
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