C={π} .D,D=30 and π=3.14
C=3.14.(30)
C=94.2 inches
How many inches in 1 mile
1 mile =5280 feet
1 foot = 12 inches
1 mile = 5280 ft
1 mile = 63,360 inches
12 mile = 63,360*12
=760,320/94.2
= 8,071.33/revolution
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