Traveling Wheel & Circular Disk

[nycmathguy]

College Algebra
Chapter 1/Section 3

Q.45

Let r = number of revolutions

C = r•pi•d

C = 4•pi•16

C = 64•pi

Q. 46

Let r = number of revolutions

C = r•pi•d

20 = r•pi•4

20/4•pi = r

5/pi = r

 

[MathLover1]

correct

 

[nycmathguy]

correct

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