Question
A boy is running at a speed of P km/hr to cover a distance of 1km but due to the slippery ground, his speed is reduced by Q km/hr(P>Q).If the takes R hours to cover the distance then,
Answer: Option A
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Actual speed = (P-Q)km/hr , time taken =R hrs
Distance =(Speed x time)
Therefore, 1 =(P-Q)R => 1/R =(P-Q)
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