Circumference
Area
Radius - backwards!
Diameter - backwards!
Word Problems
100

A circle has a diameter of 3.96 cm

Find the circumference.  Round your answer to the nearest tenth.

12.4 cm

100

A circle has a radius of 9 ft

Find the area.  Round your answer to the nearest tenth.

254.5 ft2

100

A circle has a circumference of 47 m

Find the radius.  Round your answer to the nearest tenth.

7.5 m

100

A circle has a circumference of 38 cm

Find the diameter.  Round your answer to the nearest tenth.

12.1 cm

100

The distance around the wheel of a truck is 9.42 ft. What is the diameter of the wheel?

Round your answer to the nearest hundredth.

3 ft

200

A circle has a radius of 14.9 m

Find the circumference.  Round your answer to the nearest hundredth

93.62 m

200

A circle has a diameter of 39.2 cm

Find the area.  Round your answer to the nearest hundredth.

1206.87 cm2

200

A circle has an area of 9.4 cm2

Find the radius.  Round your answer to the nearest hundredth.

1.73 cm

200

A circle has a circumference of 19.8 ft

Find the diameter.  Round your answer to the nearest hundredth.

6.30 ft

200

A dog is tied to a wooden stake in a yard. His leash is 3 m long, and he runs around in circles pulling the leash as far as it can go. How much area does the dog have to run around in?

Round your answer to the nearest hundredth.

28.27 m2

300

A circle has a radius of 38.53 m

What is the circumference?  Round your answer to the nearest hundredth.

242.09 m

300

A circle has a radius of 36.5 ft

Find the area.  Round your answer to the nearest hundredth.

4185.39 ft2

300

A circle has a circumference of 78.5 ft

Find the radius.  Round your answer to the nearest tenth.

12.5 ft

300

A circle has an area of 48 m2

Find the diameter.  Round your answer to the nearest hundredth.

7.82 m

300

The distance around a carousel is 21.98 yd. What is the radius?

Round your answer to the nearest tenth.

 3.5 yd

400

A circle has a diameter of 2 3/4 ft.

Find the circumference.  Round your answer to the nearest ones.


9 ft

400

A circle has a diameter of 7 3/5 m

Find the area.  Round your answer to the nearest thousandth.

45.365 m2

400

A circle has an area of 5 3/5 m2

Find the radius.  Round your answer to the nearest thousandth.

1.335 m

400

A circle has an area of 4.83 cm2

Find the diameter.  Round your answer to the nearest thousandth.

2.480 cm

400

A spinner has 6 sectors, half of which are red and half of which are black. If the radius of the spinner is 3 in, what is the area of the red sectors?

Round your answer to the nearest hundredth. 

14.14 in2

500

In your own words, define pi as it relates to the diameter and circumference of a circle.

Pi is the ratio of the circumference of a circle to its diameter.

500

A circle has a diameter of 27.9 cm

Find the area.  Round your answer to the nearest tenth.

611.4 cm2

500

A circle has an area of 0.47 cm2

Find the radius.  Round your answer to the nearest hundredth.

0.39 cm

500

A circle has an area of 7 3/4 m2

Find the diameter.  Round you answer to the nearest hundredth.

3.14 m

500

In a circular park with a radius of 250 m there are 7 lamps whose bases are circles with a radius of 1 m. The entire area of the park has grass with the exception of the bases for the lamps. Calculate the lawn area.

Round your answer to the nearest tenth.

196,327.5 m2

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