Question

A car travels from a to b at 40km/h amd return to a at 30km/h average speed is

Answer 1

Answer:

Its average speed during the whole journey is. 48 km/h.

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Answer 2

$Here \: distance \: is \: same.$

$∴ \: average \: speed = \frac{ 2s_{1}s_{2}}{s_{1} + s_{2}}$

$= (\frac{2 \times 40 \times 60}{40 + 60} )kmph$

$= ( \frac{2 \times 40 \times 60}{100} )kmph$

$= 48 \: kmph$