A 300 m train crosses a 200 m train coming the other way in 10 seconds, and overtakes the same train in 50 seconds when both run the same way. What is the ratio of their speeds?

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Accepted Answer

3 : 2. Total length 500 m. Sum of speeds =50 m/s, difference =10 m/s → 30 and 20 m/s, ratio 3 : 2. (5 : 1 is the ratio of sum to difference.)

A 300 m train crosses a 200 m train coming the other way in 10 seconds, and overtakes the same train in 50 seconds when both run the same way. What is the ratio of their speeds?

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