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Quantitative Aptitude

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A bullet trai...

Question

A bullet train 250 m long passes a boy who is running at 10 kmph in the same direction in which the train is going, in 20 seconds. The speed of the train in (km/hr):

A

45

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B

50

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C

55

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D

60

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E

65

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Solution

The correct option is C
55

Speed = $\frac{250}{20}$ = 45 kmph

It is the relative speed of the train

Speed of the train = 55 kmph

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