A bus is travelling the first one-third
distance at a speed of 10 km/h, the next
one-fourth at 20 km/h and the remaining
at 40 km/h. What is the average speed of
the bus?
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Explanation:
two roads at right angles to each other. their speed are 36 km/h and 48 km/h respectively. after 15 second the distance between them will be ?................2............
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