Area of Circles
Find the area of a circle with a radius of 4 cm. Use 3.14 for pi. Round your answer to the nearest hundredth.
50.24 cm2
Find the circumference of a circle with a radius of 5 cm. Use 3.14 for pi.
31.4 cm
Find the volume of a rectangular prism with a length of 6 cm, width of 4 cm, and height of 3 cm.
72 cm³
Find the surface area of a rectangular prism with length 5 cm, width 3 cm, and height 2 cm.
62 cm²
The circumference of a circle is 94.2 inches.
Find the diameter of the circle.
Use π = 3.14.
30 inches
A circle has a diameter of 10 inches. What is the area? Use 3.14 for pi.
78.5 in2
A circle has a diameter of 12 inches.
What is the circumference? Use π = 3.14.
37.68 in
Find the volume of a cylinder with a radius of 3 cm and a height of 5 cm. Use π = 3.14.
141.3 cm³
Find the surface area of a cylinder with a radius of 3 cm and a height of 7 cm. Use π = 3.14.
188.4 cm²
A shipping crate measures 2.5 m by 1.2 m by 0.8 m.
What is the volume of the crate?
Answer: 2.4 m³
V=lwh
V=2.5×1.2×0.8= 2.4 m³
Find the area of a circle with a radius of 2.5 feet. Use 3.14 for pi.
19.6 ft2
A circular track has a radius of 9 meters.
How far is one lap around the track? (Find the circumference.)
Use π = 3.14.
56.52 m
A storage box is shaped like a rectangular prism. It is 10 inches long, 5 inches wide, and 8 inches tall.
What is the volume of the box?
400 in³
A shoebox is shaped like a rectangular prism with dimensions 12 inches by 8 inches by 4 inches.
What is the surface area of the shoebox?
352 in²
The diameter of a circular pool is 18 meters.
A deck will cover half of the pool’s surface.
How much area will the deck cover?
Use π = 3.14.
Answer: 127.17 m²
Radius = 18 ÷ 2 = 9
Full area = π r2
3.14(92)=3.14(81)=254.343
Half area = 254.34÷2=127.17254
The area of a circle is 78.5 square meters. What is the radius of the circle? Use 3.14 for pi.
5 meters
Find the circumference of a circle with a diameter of 7.5 feet.
Use π = 3.14. Round your answer to the nearest tenth.
23.6 ft
Find the volume of a cylinder with a diameter of 8.4 meters and a height of 6 meters. Use π = 3.14. Round to the nearest tenth.
332.3 m³
Find the surface area of a cylinder with a diameter of 10 meters and a height of 6 meters.
Use π = 3.14.
345.4 m²
A company needs to paint the entire outside of a silo (including top and bottom) that is shaped like a cylinder. The silo has a radius of 6 feet and a height of 14 feet. What is the total surface area that will be painted? Use π = 3.14.
Answer: 753.6 ft²
Surface Area = 2πr2 + 2πrh
226.08 + 527.52=753.6
Find the area of a semi-circle with a diameter of 14 cm. Use 3.14 for pi. Round to the nearest hundredth.
76.93 cm2
The circumference of a circle is 62.8 centimeters.
What is the radius of the circle?
Use π = 3.14.
10 cm
A soup can is shaped like a cylinder with a radius of 4 cm and a height of 12 cm.
How much soup can the can hold? Use π = 3.14.
602.88 cm³
A water bottle is shaped like a cylinder with a radius of 2.5 inches and a height of 9 inches.
What is the total surface area of the bottle?
Use π = 3.14. Round to the nearest tenth.
180.6 in²
A shipping company packs boxes into a larger storage container. The container is shaped like a rectangular prism with a length of 15 cm, a width of 8 cm, and a height of 10 cm. Each package takes up 600 cm³ of space. How many packages can fit inside the container?
Answer: 2 packages
Step 1: Find volume of the container
Volume = l×w×h
= 15×8×10=1200 cm3
Step 2: Divide by package size
1200÷600=2