+0  
 
+1
166
3
avatar+771 

The radius of a car wheel is 15 inches. How many revolutions per minute is the wheel making when the car is traveling at 60 mph?

AdamTaurus  Jan 30, 2018

Best Answer 

 #1
avatar+12565 
+2

60 m/hr  x  5280 feet/m  x  12 in/ft  x  1 hr/60min =  63360 in/min

 

Circumference = pi x 2r = pi x 30 = 94.2477 inches/circumf

 

63360 in /min  x  1 circumf/94.2477 inches = 672.27 circumf/min = rpm

ElectricPavlov  Jan 30, 2018
 #1
avatar+12565 
+2
Best Answer

60 m/hr  x  5280 feet/m  x  12 in/ft  x  1 hr/60min =  63360 in/min

 

Circumference = pi x 2r = pi x 30 = 94.2477 inches/circumf

 

63360 in /min  x  1 circumf/94.2477 inches = 672.27 circumf/min = rpm

ElectricPavlov  Jan 30, 2018
 #2
avatar+771 
+2

Okay. I got the right answer. Thanks!

AdamTaurus  Jan 30, 2018
 #3
avatar+12565 
+2

Great!  If we BOTH got the same answer, it is likely I got the right answer too!     Thanx    !

ElectricPavlov  Jan 30, 2018

12 Online Users

avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.