Question 512020
Your car came equipped with 17 inch radius tires.
You upgrade to 20 inch wheels and t
When you think your speed is 60 mph, How fast are you really going?
:
The circumference is directly proportional to the diameter to the wheel
Let s = speed with 20" wheels
{{{17/20}}} = {{{60/s}}}
Cross multiply
17s = 20*60
s = {{{1200/17}}}
s = 70.6 mph
:
Figure the number of inches per revolution of the tire to the mph.
c = {{{20*pi}}}
c = 62.832 inches per revolution
:
How many Revolutions would it take in one hour to cover 60 mile
{{{(60*5280*12)/62.832}}} = 60,504.2 revolutions (with a 20" wheel)