Circumference of Circles
What is the approximate circumference of a plate with a diameter of 11 inches? Use 3.14 for pi. Round to the nearest hundredth if necessary.
34.54 inches
Find the approximate area of a circle with a radius of 6.45 cm. Use 3.14 for pi. Round to the nearest hundredth if necessary.
130.63 square centimeters
Find the surface area of a cylinder with a radius of 5 ft and a height of 7 ft. Use 3.14 for pi.
376.8 square feet
A battery is shaped like a cylinder. It has a height of 5.5 inches and a base radius of 2.2 inches. What is the volume of the battery? Use 3.14 for pi.
83.6 cubic inches
What is the area of a circle with a circumference of 94.20 cm, rounded to the nearest tenth? Use 3.14 for pi.
706.5 square centimeters
Jasmine has a circular swimming pool with a radius of 4.2 meters. What is the circumference of the pool? Express your answer in terms of pi.
8.4pi m
A nickel has a diameter of 21.21 millimeters. What is the approximate area of the face of a nickel? Use 3.14 for pi. Round to the nearest hundredth if necessary.
353.14 square millimeters
Find the surface area of a cylinder with a radius of 6cm and a height of 16cm. Use 3.14 for pi.
828.96 square centimeters
What is the volume of a cylinder with a radius of 7 cm and a height of 35 cm? Use 3.14 for pi. Round to the nearest tenth.
5,385.1 cubic centimeters
A circular garden has a circumference of 39.25 feet. Find the approximate diameter of the garden. Use 3.14 for pi. Round to the nearest hundredth if necessary.
12.5 ft
What is the approximate circumference of a circle with a diameter of 2.3 centimeters? Use 3.14 for pi. Round to the nearest hundredth if necessary.
7.22 centimeters
The Caldwells had a new concrete patio installed in the shape of a semicircle as shown. The semicircle has a diameter of 26.75 ft. Mr. Caldwell wants to cover the patio with concrete sealer. What is the approximate area he will need to cover with concrete sealer? Use 3.14 for pi. Round to the nearest hundredth if necessary.
280.86 square feet
Find the surface area of a cylinder with a diameter of 11cm and a height of 12cm. Express your answer in terms of pi.
192.5pi square centimeters
A cylinder has a diameter of 3.4 m and a height of 1.6 m. What is the volume of the cylinder? Express your answer in terms of pi.
4.6pi cubic meters
The exact circumference of a circle is 15.6pi inches. What is the area of the circle? Express your answer in terms of pi. Round to the nearest hundredth if necessary.
60.84pi square inches
A carpenter has two different-sized circular saws. The smaller saw has a radius of 1.25 inches. The larger saw has a diameter that is 1.5 inches greater than the diameter of the smaller one. How much greater is the circumference of the larger saw than the smaller saw? Use 3.14 for pi. Write your answer as a decimal rounded to the nearest hundredth.
4.71 inches
What is the approximate area of a circle with radius of 9 inches? Use 3.14 for pi. Round to the nearest hundredth if necessary.
254.34 square inches
Find the surface area of a cylinder with a diameter of 11 centimeters and a height of 12 centimeters. Express your answer in terms of pi.
192.5pi square inches
What is the volume of a cylinder with a diameter of 20 ft and a height of 16 feet? Express your answer in terms of pi.
1,600pi cubic feet
An aquarium at the zoo is shaped like a cylinder. It has a height of 4 feet and a base radius of 2.5 feet. The aquarium is being filled with water at a rate of 12 gallons per minute. If one cubic foot is about 7.5 gallons, how long will it take the aquarium to fill? Use 3.14 for pi. Round to the nearest whole minute.
49 minutes