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Jill is 16.5 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks 3 kilometers per hour If they meet in 3 hours how fast is Joe walking?
Wiki User
∙ 12y ago
Call Joe's speed in kilometers per hour j and the distance Jill has travelled when they meet d. From the physical law that distance d travelled at constant speed equals the product of speed and time t and the problem statement, d = 3 X 3 and the distance travelled by Joe must be 16.5 - d = 7.5. The time walked by each is the same when they meet, since they started at the same time. Joe's speed is the distance he walked divided by the stated time of 3 hours, or 7.5/3 = 2.5 kilometers per hour.
Wiki User
∙ 12y ago
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