(ii)A train travels the first 15 km at a uniform speed of 30 km/h, the next 75
km at a uniform speed of 50km/h and the last 10 km at a uniform speed of
20 km/h. Calculate the average speed for the entire journey.
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Answer:
40 km/ hr
Explanation:
we here use the concept of average speed directly but before that we have to find the time
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