Question

A high-speed Bullettrain takes 20 seconds to cross a platform. The length of the Bullettrain is 40% less than the length of the platform. If the Bullettrain's speed is increased by 25%, what will be the time taken by the train to cross a pillar?

Q: Answer-A high-speed Bullettrain takes 20 seconds to cross a platform. The length of the Bullettrain is 40%...

ATQ, Let the length of the platform be 10a metres So, length of the train 10a 0.6 6a So, speed of the train 6a 10a20 0.8a ms So, new speed of the train 0.8a 1.25 a ms So, required time 6a a 6 seconds

A 10 sec

B 4 sec

C 6 sec

D 12 sec

E none of these

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A high-speed Bullettrain takes 20 seconds to cross a platform. The length of the Bullettrain is 40% less than the length of the platform. If the Bullettrain's speed is increased by 25%, what will be the time taken by the train to cross a pillar?

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