SOLUTION: The wheels of a car have a diameter of 10meters. If the speed of the car is 50 meters per hour, hoe many revolutions does one whelk make in one hour?

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Question 1143603: The wheels of a car have a diameter of 10meters. If the speed of the car is 50 meters per hour, hoe many revolutions does one whelk make in one hour?

Found 3 solutions by Alan3354, greenestamps, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The wheels of a car have a diameter of 10meters. If the speed of the car is 50 meters per hour, hoe many revolutions does one whelk make in one hour?
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Some BIG wheels.
Each revolution moves 10pi meters.
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50 m/hr for 1 hour ---> 50 meters.
----
# of revs = 50/(10pi)

Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


(corrected response.... the circumference is pi times the diameter, not 2pi times the diameter....)

diameter = 10 meters --> circumference = 10pi meters = 1 revolution

number of revolutions in 1 hour = number of revolutions in 50 meters = 50/(10pi)

If an answer in a particular form is needed, use a calculator and round as directed.

Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
.

The correct answer is  50%2F%2810%2Api%29 = 5%2Fpi%29,  obtained by Alan.

The answer  50%2F%2820%2Api%29  by @greenestamps is not correct.


            (@greenestamps just fixed it after my notice . . . )