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

August 30, 2016 Quiz Questions

A train covers a certain distance in 210 minutes at a speed of 60 km/hr. The time taken by the train, to covers the same distance at a speed of 80 km/hr is :
[A]3\frac{5}{8}\ hours
[B]2\frac{5}{8}\ hours
[C]4\frac{5}{8}\ hours
[D]3\ hours

\mathbf{2\frac{5}{8}\ hours}
Speed of train = 60 km/hr
Time = 210\ minutes = \frac{210}{60} = \frac{7}{2}\ hours
Distance covered = 60\times \frac{7}{2} = 210\ km
Time taken at 80 km/hr = \frac{210}{80} = \frac{21}{8} = 2\frac{5}{8}\ hours
Hence option [B] is correct answer.

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