N a 600 m race, the ratio of the speeds of two contestants a and b is 3 : 4. a has a start of 240 m. then, a wins by:
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speed of a is 3x and speed of b is 4x
but a started at 240 m and became ahead
600-240=360m
but a started at 240 m and became ahead
600-240=360m
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