Edge Express
July 8th, 2008
Trig Problems Practice Please Help?
A carousel has a radius of 17 feet and takes 28 seconds to make one complete revolution. What is the linear speed of the carousel at its outside edge? Express the answer in feet per second.
a. 106.81
b. 0.61
c. 10.35
d. 3.81
Thanks for the help.
Well, you need the circumference, no?
C=(2pi)r=2pi(17)=34pi
rate * time = distance
28r=34pi
r=34pi/28
Is approximately equal to 3.81479. That's answer D.
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