A student while going to school in a school bus,
observes the average speed of the bus to be
20 km/h. On his return trip along the same way,
the average speed is 30 km/h. What is the average
speed of the bus in the entire journey?
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Answer:
24 m/s
Explanation:
average velocity = 2 ×V1 × V2 /V1 +V2
=2×20×30/20+30.
= 2×20×30/50 = 24m/s
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