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A person travels from P to Q at a speed of 40 kmph and returns by increasing his speed by 50%. What is his average speed for the both the trips?


A person travels from P to Q at a speed of 40 kmph and returns by increasing his speed by 50%. What is his average speed for the both the trips?


[A] 36 kmph
[B] 45 kmph
[C] 48 kmph
[D] 50 kmph



ANS: C
Explanation:
Speed on return trip = 150% of 40 = 60 kmph.
Therefore Average speed =[(2 x 40 x 60)/(40 + 60)] km/hr = (4800/100) km/hr = 48 km/hr.
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