Correct Answer - Option 4 : 40 sec
Given
The length of train = 415 m
Speed of train = 63 km/hr
Formula Used
Distance = speed × time
Calculation
Total distance = length of train + length of tunnel = 415 + 285 = 700 m
speed of train in m/s = 63 × (5/18) = 17.5 m/s
Time taken to cross tunnel = 700/17.5 = 40 sec
∴ The required answer is 40 seconds
