1. Find the circumference, in feet of a circle with a diameter of 30 inches.

2. Find the circumference, in inches, of a circle with a diameter of 30 feet.

3. Find the circumference, in feet, of a circle with a diameter of 22.3 inches.

4. Find the perimeter, in feet, of a rectangle that is 35 feet long and 15 feet wide.

5. Find the perimeter, in feet, of a rectangle that is 100 inches long and 8 inches wide.

Answers:

1. 7.85 ft
(30 inches) / (12 inches/ft) = 2.5 ft X 3.14 =

2. 1130.4 in
30 feet X 12 in/ft = 360 in X 3.14 =

3. 5.84 ft
(22.3 in) / (12 in/ft) = 1.858 ft X 3.24 =

4. 100 ft
35 ft + 35 ft + 15 ft + 15 ft =

5. 18 ft
(100 in) / (12 in/ft) = 8.33 ft (8 in) / (12 in/ft) = 0.667 ft
8.33 ft + 8.33 ft + 0.667 ft + 0.667 ft = 17.99