Question : A train 150 m long takes 20 seconds to cross a platform 450 m long. The speed of the train (in km/hr) is:
Option 1: 108 km/hr
Option 2: 100 km/hr
Option 3: 106 km/hr
Option 4: 104 km/hr
Correct Answer: 108 km/hr
Solution :
Distance to be covered = 150 + 450 = 600 m
Time = 20 sec
$\therefore$ Speed = $\frac{600}{20}$ = 30 m/sec $= 30 × \frac{18}{5}$ = 108 km/hr
Hence, the correct answer is 108 km/hr.
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