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A train, 150 m long, is running at 90 km/h. How long (in seconds) will it take to clear a platform that is 300 m long?
Answer & Solution
Correct Answer:
Option
B
$$\eqalign{
& 90{\text{ km/h}} \to \frac{{90 \times 5}}{{18}} = 25{\text{ m/s}} \cr
& {\text{Time}} = \frac{{150 + 300}}{{25}} = 18\,{\text{seconds}} \cr} $$
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