Problem Runners A and B start together in a race around a 900-ft oval track. Runner A is making a speed of 27 ft/sec and runner B at 22.5 ft/sec. How long will it take runner A to be exactly one circumference ahead of runner B.

Solution

$27t - 22.5t = 900$

$4.5t = 900$

$t = 200 ~ \text{sec}$ answer

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