There are two towns A and B. Raju goes from A to B at 40 kmph and comes back to the starting point at 60 kmph. What is his average speed during the whole journey?

 a) 48 kmph
 b) 52 kmph
 c) 56 kmph
 d) 50 kmph
Bevco Asst-2015

48 kmph.
Solution
Average speed for travelling at speed a for half the distance and speed b for other half of the distance= 2ab/(a + b)

So Avg Speed = 2 x 40 x 60/(40+60) = 48 kmph
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