6.
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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:
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A.
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60 m
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B.
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40 m
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C.
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20 m
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D.
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10 m
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Answer: Option C
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.
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While A covers 360 m, B covers
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4
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x 360
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m
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= 480 m.
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3
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Thus, when A reaches the winning post, B
covers 480 m and therefore remains 20 m behind.
A wins by 20 m.
