world ones?

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The time it takes to cover the distance between two cities by car is inversely proportional to the speed of the car. The trip takes 2 hours for a car moving at 65 mph. What is the speed of a car that makes the trip in 10 hours?

2006-12-07 09:48:01 · 2 answers · asked by elizabeth 1 in Science & Mathematics ➔ Mathematics

2 answers

If the second car takes 5 times as long, it must be moving 1/5th as fast.
1/5th of 65 is 13
So the second car is moving at 13 miles per hour.

2006-12-07 09:51:22 · answer #1 · answered by firefly 6 · 0⤊ 0⤋

13. 10 hours is 5 times as long as 2 hours. If it is inversely proportional then you would be going 5 times slower. which is 13.

2006-12-07 09:52:58 · answer #2 · answered by mitchellinho 4 · 0⤊ 0⤋