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

A. 44 km/hour

B. 46 km/hour

C. 48 km/hour

D. 50 km/hour

Correct Answer : C.


Speed while going = 40 km/hr
Speed while returning = 150% of 40 = 60 km/hr
Average speed =2xyx+y
=2×40×6040+60=4800100=48Km/hr 

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