Question : A train of length 212 m is running at 45 km/hr. In what time (in seconds) will it cross a platform of length 188 m?
Option 1: 32
Option 2: 40
Option 3: 42
Option 4: 36
Correct Answer: 32
Solution :
The total distance to be covered by the train to completely cross the platform is the sum of the length of the train and the length of the platform, which is (212 + 188) = 400 m
The speed of the train is given in km/hr,
$45 \text{ km/hr} = 45 \times \frac{5}{18} = 12.5 \text{ m/s}$
The time taken to cross the platform,
$\text{Time} = \frac{\text{Distance}}{\text{Speed}} = \frac{400}{12.5} = 32 \text{ seconds}$
Hence, the correct answer is 32.
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