The number of revolution the wheel makes in 7 miles is 4706 revolutions
Since the wheel is a circle, its circumference is travelled in 1 revolution.
So, circumference C = πd where d = diameter of wheel = 30 in
So, C = πd
= π × 30 in
= 30π in
= 94.25 in
Now, we need to find the number of revolutions the wheel makes when the tractor travels D = 7 miles.
Since 1 mile = 63360 in,
Converting miles to inches, we have D = 7 miles
= 7 × 1 mile
= 7 × 63360 in
= 443520 in
So, the number of revolution the wheel makes in 7 miles is N = D/C
= 443520 in/94.25
= 4705.89
≅ 4706 to the nearest whole number
So, the number of revolution the wheel makes in 7 miles is 4706 revolutions
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