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Question: The diameter of a car wheel is 18 in. How far will the car go in 8 revolutions of the wheel?


A ) 144π
B ) 144π
C ) 8π
D ) 18π

Steps to derive

1 The diameter of the car wheel = 18 in.

2 Circumference of the circle (car wheel) = π d

 [Substitute d = 18.]
3 = 18π in

4 For one revolution the car travels 18π in.

5 Distance traveled by the car in 8 revolutions = 18π × 8

6 = 144π in

7 After 8 revolutions, the car travels 144π in.



Hence the right answer is Option A

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