(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
15
Answer:
v1=8km/h
v2=32km/h
AS=2v1.v2/v1+v2
=2×8×32/40=12.8km/h
Similar questions