A truck with 36-in.-diameter wheels is traveling at 55 mi/h.

How many revolutions per minute do the wheels make?

The wheels make 512 revolutions per minute

Step-by-step explanation:

Diameter of truck = 36 in

Speed = 55 mi/h

Revolutions per minute = ?

Radius r = diameter / 2

r = 36/2

r = 18 inches

Speed = 55 mi/h

1 mile = 63360 inches

55 miles = 55*63360 inches

55 miles = 3484800 inches

1 hr = 60 minutes

Speed = 3484800 inches/60 minutes

Speed = 58,080 inches/min

The formula used to calculate the revolutions per minute is:

revolutions = speed/Circumference

revolutions = 58,080 / 2*3.14*18

revolutions = 58,080 / 113.4

revolutions = 512.16

revolutions = 512 revolutions per minute

So, The wheels make 512 revolutions per minute