A train $225$ m long is travelling at a uniform speed of $54$ km/hr. How much time will it take to pass a telegraph post ?

5

sec

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15

sec

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20

sec

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25

sec

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Solution

The correct option is B $15$ sec
Given, Distance $= 225 m = 0.225$ km
Speed $= 54$ km/hr

$= \frac{54}{3600}$ km/sec

$∴$ Time $= \frac{D i s t a n c e}{S p e e d} = \frac{0.225}{54} \times 3600$
$= 15$ sec

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