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Question

A car travels half the distance with constant velocity of 40kmph and the remaining half with a constant velocity of 60kmph. The average velocity of the car in kmph is


A

40

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B

45

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C

48

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D

50

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Solution

The correct option is C

48


Explanation for the correct option:

Let the total distance travelled be 2x

Time taken in travelling the first half of the distance xwill be t1=x40

and the time taken in travelling the second half of the distance xwill be t2=x60

Now the average velocity can be calculated as V=totaldistancetotaltime

=2xt1+t2=2xx40+x60=2x5x120=48kmph
Hence, option C is correct.


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