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In a 200-metre race, A beats B by 20 metres. What is the ratio of A's speed to B's speed?
A$200:180$
B$11:10$
C$10:9$
D$20:18$
Answer & Solution
Correct answer: C. $10:9$
When A finishes 200 m, B has covered 200 − 20 = 180 m in the same time. Speed ratio (same time) = distance ratio = 200:180 = 10:9.
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