SOLUTION: A bike is traveling at 10 mph. Wheel diameter is 28 in. Determine number of revolutions per min. Portion of solution with problem- n revolutions per min. Wheel travels

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Question 1128635: A bike is traveling at 10 mph. Wheel diameter is 28 in. Determine number of revolutions per min.
Portion of solution with problem-
n revolutions per min.
Wheel travels pi * 28 * n in. in 1 min.
Wheel travels pi * 28 * n * 60 in. in 1 hr.

pi * 28 * n * 60 / (5280 * 12)
pi * 28 * n * 60 / (5280 * 12) = 10
pi * 7 * n / (88 * 3) = 10
n = 10 * 88 * 3 / (pi * 7)

10 * 88 / 7 = approx. 130
n = 120
Please explain solution with missing steps. Non-homework.




Answer by josgarithmetic(39626) About Me  (Show Source):
You can put this solution on YOUR website!
Diameter 28 inches is radius 14 inches. CIRCUMFERENCE is 28pi inches.

IN ONE MINUTE, the bike travels how far? How many INCHES?


%2810%2A5280%2A12%2F60%29 INCHES in 1 MINUTE

5280%2A12%2F6

5280%2A2

10560---------inches in 1 minute


How many circumferences of 28pi inches are in 10560 inches?

highlight%2810560%2F%2828pi%29%29
Compute this.




About 120