Two trains cross each other in 15 seconds when moving in the opposite direction and 210 seconds when moving in the same direction. By what percent is the speed of the faster train more than that of the slower train?

Two trains cross each other in 15 seconds when moving in the opposite

1.	Two trains cross each other in 15 seconds when moving in the opposite direction and 210 seconds when moving in the same direction. By what percent is the speed of the faster train more than that of the slower train?
A.	15%
B.	17%
C.	13%
D.	18%
E.	Data inadequate
Answer» B. 17%

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Two trains cross each other in 15 seconds when moving in the opposite direction and 210 seconds when moving in the same direction. By what percent is the speed of the faster train more than that of the slower train?

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