Ali runs 1 km in 4 minutes and Babar runs it in 4 minutes 10 seconds. By how many metres does Ali beat Babar in a 1 km race?
Correct answer D. 40 m
Explanation
Babar's speed = 1000 / 250 = 4 m/s. In Ali's 240 seconds, Babar covers 960 m, so Ali wins by 40 m.
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