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A train 150 metres long takes 20 seconds to cross a platform 450 metres long. The speed of the train in, km per hour is :
Answer & Solution
Correct Answer:
Option
C
$$\eqalign{
& {\text{Speed of train :}} \cr
& = \frac{{450 + 150}}{{20}} \cr
& = 30{\text{ m/s}} \cr
& {\text{Speed (in km/hr):}} \cr
& = 30 \times \frac{{18}}{5} \cr
& = 108{\text{ km/hr}} \cr} $$
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