Train A crosses a pole in 25s and tarin B crosses the pole in 1 min 15 s. Length of train A is half the length of train B. What is the ratio between the the speed of A and B respectively ?
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Train A crosses a pole in 25s and tarin B crosses the pole in 1 min 15 s. Length of train A is half the length of train B. What is the ratio between the the speed of A and B respectively ?