alleryIn a 200 m race A beats B by 20 m. A runs at 10 m/s. What is B’s speed?
A8 m/s
B9 m/s
C8.5 m/s
D9.5 m/s
Answer & Solution
Correct answer: B. 9 m/s
A finishes in 20 seconds, during which B covers 180 m, giving 9 m/s.
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