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A 415 m long train is running at 63 km/h. In how much times will it cross a tunnel 285 m long ?1. 45sec2. 52 sec3. 2 min4. 40 sec

Answer» 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 



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