SOLUTION: What is the approximate diameter of a wheel that made 752 revolutions when it rolled 1 kilometer? a) 24.2 cm b) 32.0 cm c) 42.3 cm d) 84.6 cm e) 113 cm

Question 251839: What is the approximate diameter of a wheel that made 752 revolutions when it rolled 1 kilometer?
a) 24.2 cm b) 32.0 cm c) 42.3 cm d) 84.6 cm e) 113 cm
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
What is the approximate diameter of a wheel that made 752 revolutions when it rolled 1 kilometer?
a) 24.2 cm b) 32.0 cm c) 42.3 cm d) 84.6 cm e) 113 cm
.
Determine how far he went on each revolution of the wheel:
1/752 km
Convert to cm:
1/752 * 1000m/km * 100cm/m = 132.979 cm (circumference of wheel)
.
circumference = (pi)d
d = circumference/(pi)
d = 132.979/3.14
d = 42.33 cm
.
Answer is C
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