Shanghai Maglev and Harmony CRH 380A are two fastest train in world. Train Harmony CRH 380A whose length is three-fifth of that of train Shanghai Maglev crosses it travelling in opposite direction in a time which is 3/7 th of the time taken by Shanghai Maglev to cross it when travelling in same direction. Calculate the ratio of the speeds of Shanghai Maglev and Harmony CRH 380A.

Shanghai Maglev and Harmony CRH 380A are two fastest train in world. T

1.	Shanghai Maglev and Harmony CRH 380A are two fastest train in world. Train Harmony CRH 380A whose length is three-fifth of that of train Shanghai Maglev crosses it travelling in opposite direction in a time which is 3/7 th of the time taken by Shanghai Maglev to cross it when travelling in same direction. Calculate the ratio of the speeds of Shanghai Maglev and Harmony CRH 380A.
A.	2 : 7
B.	5 : 2
C.	3 : 2
D.	4 : 3
E.	None of these
Answer» C. 3 : 2

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