The diameter of a tire is 20 inches. Which of these is a good estimate for the distance around the tire?
Hint: C = nd

We are essentially making the circle "O" into a line "_" and repeating that line over and over again into we reach 100 yards. So we need to find the perimeter--the line around, as it were--of that circle.

Pcircle = 2πr, or πd (2*radius is the same as the diameter)

d = 20 inches

π ≈ 3.14

Pcircle = 20 in * 3.14 = 62.8 inches

Now we need to convert yards into inches:

3 ft / yd & 12 in / ft

That gives us:

100 yd * 3 ft/yd * 12 in/ft

3600 inches

Now we divide:

3600 inches / 62.8 inches = 57.324 rotations

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared