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Finding Average Velocity

A bus going f...

Question

A bus going from Kota to Jaipur passed the 100 km, 160 km and 220 km points at 10.30 am, 11.30 am and 1.30 pm. The average speed during 10.30 to 1.30 pm is

60 km/h

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30 km/h

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40 km/h

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120 km/h

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Solution

The correct option is A 40 km/h
The distance covered between 10.30 am to 1.30 pm is $220 k m - 100 k m = 120 k m$ .
The time interval is 3 hour. The average speed during this interval is
$v_{3} = \frac{120 k m}{3 h} = 40 k m / h r$

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