Q49: A car travels at

October 15, 2026

2018 Test A Math · Question 49 of 57

A car travels at 4,400 feet per minute. The radius of each tire on the car is 1 foot. How many revolutions does one of these tires make in 1 minute? (Use the approximation $\frac{22}{7}$ for $\pi$ .)

A700
B1,925
C13,828
D15,400

Show the answer

Correct answer: A

One revolution is equal to the circumference of the tire:

$C=2pi r=2(1)(frac{22}{7})=\frac{44}{7}$

The car travels at 4,400 ft per minute. To calculate the number of revolutions, divide the speed by the circumference:

$4,400div frac{44}{7}=4,400times frac{7}{44}=700$

700 revolutions.