A train covers a certain distance in 210 minutes at a speed of 60 kmph. The time taken by the train, to cover the same distance at a speed of 80 kmph is

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21/8 hours

37/8 hours

3 Hours

answer is B.

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Detailed Solution

Train covers a certain distance in 210 minutes at a speed of 60 Kmph

total distance covered is 210 km

The time taken by the train to cover hte same distance at a speed of 80 kmpm is $\frac{210}{80} = \frac{21}{8} hours$

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