The average speed of a cyclist who covers first, second and third

The average speed of a cyclist who covers first, second and third km at 20, 16 and 12 km/hr respectively (in kmph) is:
(a) 16.24
(b) 16
(c) 15.66
(d) 15.32

Anurag Mishra Professor Asked on 16th May 2016 in Maths.
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  • 1 Answer(s)

    Answer: (d) 15.32 

    Solution:-
    Total distance covered = 3 km
    Total time taken = (1/20 + 1/16 + 1/12) = 47/240

    Therefore Average speed = 3/(47/240) km/hr
    =15.32 km/hr

    Hence, the correct answer  is option (d) 15.32. 

    Anurag Mishra Professor Answered on 18th May 2016.
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