SOLUTION: How far will a wheel with radius 5/π roll in two revolutions? a) 25/π units b) 10 units c) 20 units d) none of these

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Question 283360: How far will a wheel with radius 5/π roll in two revolutions?
a) 25/π units b) 10 units c) 20 units d) none of these
Found 2 solutions by Theo, richwmiller:
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
circumference = 2*pi*r

circumference = 1 revolution

1 revolution = 2*pi*r

r = 5/pi

1 revolution = 2*pi*5/pi = 2*5 = 10

2 revolutions = 20

Answer is selection c.


Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
One revolution is one circumference.
C=2*pi*r
If the radius is 5/pi
then we have 2*2*pi*5/pi=4*5=20 units
c)20 units