Question
A car driver travels from the plains to the hill station, which are 200 km apart at an average speed of 40 km/hr . In the return trip, he covers the same distance at an average speed of 20 km/hr . The average speed of the car over the entire distance of 400 km is :
Answer: Option B
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Average speed = `((2 xx 40 xx 20)/(40 + 60)` km/hr
= `(80/3)` km/hr = 26.67 km/hr.
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