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In a 500 m race, the ratio of the speeds of two contestants A and B is 3 : 4. A has a start of 140 m. Then, A wins by:

Correct Answer: 20 m

Explanation:

To reach the winning post A will have to cover a distance of (500 - 140)m, i.e., 360 m.


While A covers 3 m, B covers 4 m.



While A covers 360 m, B covers 4 x 360 ❩m = 480 m.
3


Thus, when A reaches the winning post, B covers 480 m and therefore remains 20 m behind.


∴ A wins by 20 m.


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