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9 October, 20:56

A world-record swimmer and a dolphin compete in a 400-meter race. The swimmer swims at a rate of 2 meters per second, and the dolphin swims at a rate of 8 meters per second. When the dolphin crosses the finish line, how many meters is the swimmer from the finish line?

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  1. 9 October, 21:59
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    300 meters away

    Step-by-step explanation:

    it will take the dolphin 50 seconds to finish the race (400/8)

    it will take the man 200 seconds to finish the race (400/2)

    by the time the dolphin crosses the finish line it will take the swimmer 150 seconds to reach the finish line (200 - 50 seconds)

    recall the swimmer swims at 2 meters per second and has 150seconds to reach the finish line hence he is 300 meters away (150 x 2)
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