- A32 s
- B20 s
- C50 s
- D40 s
Step-by-Step Solution
B runs 800 m in 160 s → 5 m/s, so B needs s. A wins by 40 s. (32 s is the 160 s scaled by 20%.)
Answer: D) 40 s
A runs a 1 km race in 160 seconds. When A finishes, B is still 200 m behind. By how many seconds does A beat B?
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