A man goes up a hill at 18 kmph and comes down at 24 kmph along the same path. What is his average speed?

Options
- 20.57 kmph
- 21.22 kmph
- 22 kmph
- 23 kmph

CORRECT ANSWER : 20.57 kmph

Discussion Board
Here Average speed in same direction wil be 2xy/x+y

Average Speed = 2xy/x+y
x=18 , y=24
= 2*18*24 / 18+24
= 144 / 7
= 20.57

Prachi kakade 07-9-2020 02:35 PM

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