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Question

A person travels from A to B at the speed of 120 km an hour and returns from B to A at the speed of 80 - km an hour. What is his average speed?

A
100 km/hr
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B
96 km /hr
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C
90 km /hr
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D
60 km /hr
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Solution

The correct option is B 96 km /hr
Letthedistancebex,timetakentotravel=x120,timetakentoreturn=x80,averagespeed=Totaldistancetimetaken=2xx120+x80=2x2405x=96km/hr

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