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A And B Runs Around A Circular Track. A Beats B By One Round Or 10 Minutes. In This Race, They Had Completed 4 Rounds. If The Race Was Only Of One Round, Find The A's Time Over The Course? |
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Answer» B runs AROUND the track in 10 MIN. i.e ,SPEED of B = 10 min per round Therefore, A beats B by 1 round Time taken by A to COMPLETE 4 rounds = Time taken by B to complete 3 rounds = 30 min Therefore, A's speed = 30/4 min per round = 7.5 min per round Hence, if the race is only of one round A's time over the course = 7 min 30 sec. B runs around the track in 10 min. i.e ,Speed of B = 10 min per round Therefore, A beats B by 1 round Time taken by A to complete 4 rounds = Time taken by B to complete 3 rounds = 30 min Therefore, A's speed = 30/4 min per round = 7.5 min per round Hence, if the race is only of one round A's time over the course = 7 min 30 sec. |
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