Physics, asked by nagendrayadav67, 1 year ago

(Ans. 36 s)
28. A cyclist goes uphill at a speed of 8 km/h and
downhill at a speed of 32 km/h. If the uphill
and downhill journeys involve the same
distance, what is his average speed during
the whole journey. (Ans. 12.8 km/h)

Answers

Answered by ghanshyamkumar51

15

Answer:

v1=8km/h

v2=32km/h

AS=2v1.v2/v1+v2

=2×8×32/40=12.8km/h

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