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.
Add Comment
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.
Add Comment

Your Answer

By posting your answer, you agree to the privacy policy and terms of service.