The task is to generate the correct answer for a given math problem.

[Q]: Problem: a bullet train covers a distance in 50 min , if it runs at a speed of 48 kmph on an average . the speed at which the bullet train must run to reduce the time of journey to 40 min will be .
[A]: 60 kmph


[Q]: Problem: what is 82 % of 3 / 5 ?
[A]: 0.492


[Q]: Problem: if a train , travelling at a speed of 120 kmph , crosses a pole in 6 sec , then the length of train is ?
[A]:
200