Question
A car running with a speed of βxβ 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 β 32) m/sec.Solution
Distance covered by the car = 5 Γ 2Οr = 2 Γ (22/7) Γ 42 Γ 5 = 1320 metres Speed of the car = 1320/10 = 132 m/sec Required time taken = 300/(x β 32) = 300/100 = 3 seconds
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