Question

If a man covers a certain distance with an average speed of 40km/h in a vehicle and
return to the starting point with a speed of 30km/h along a straight road. Find the

average speed for the entire journey.​

Answer 1

Explanation:

When the distance covered is equal,

$average \: speed \: = \frac{2(v1)(v2)}{v1 + v2} \\ average \: speed \: = \frac{2(40)(30)}{40 + 30} \\ average \: speed \: = \frac{240}{7} \\ average \: speed \: =34.28kmph$

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