Bhavna starts round a 400 m track at 6 m/s. Ten seconds later Anu starts from the same point in the same direction at 8 m/s. How many times does Anu pass Bhavna in the first 10 minutes after Anu starts?

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Accepted Answer

3. Bhavna's lead is 60 m. In 600 s Anu gains 2×600=1200 m. Passes happen at gains of 60, 460 and 860 m (the next, 1260 m, is too far): 3 passes.

Bhavna starts round a 400 m track at 6 m/s. Ten seconds later Anu starts from the same point in the same direction at 8 m/s. How many times does Anu pass Bhavna in the first 10 minutes after Anu starts?

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