Circumference and Conversion Challenges for Grade 5

A circular garden has a diameter of 10 feet. What is the approximate circumference of the garden? (Use 3.14 for π)

• 25.6 feet

• 15.7 feet

• 31.4 feet

• 20 feet

If a bicycle tire has a circumference of 66 inches, how many feet is that? (Hint: 1 foot = 12 inches)

• 6 feet

• 7.5 feet

• 5.5 feet

• 4 feet

A round table has a circumference of 31.4 inches. What is the diameter of the table? (Use 3.14 for π)

• 12 inches

• 15 inches

• 8 inches

• 10 inches

You want to put a fence around a circular playground with a radius of 15 meters. Estimate the circumference of the playground.

• Approximately 100 meters

• Approximately 94.25 meters

• Approximately 85 meters

• Approximately 75.5 meters

A circular swimming pool has a diameter of 8 meters. How many centimeters is the circumference? (Hint: 1 meter = 100 centimeters)

• 1500 centimeters

• 3000 centimeters

• 2000 centimeters

• 2513.27 centimeters

If a pizza has a circumference of 18 inches, what is its radius? (Use 3.14 for π)

• 9 inches

• 3.14 inches

• 2.865 inches

• 5.73 inches

A circular track has a circumference of 400 meters. How many kilometers is that? (Hint: 1 kilometer = 1000 meters)

• 0.4 kilometers

• 1 kilometer

• 0.5 kilometers

• 0.25 kilometers

You are making a circular flower bed with a radius of 4 feet. Estimate the circumference of the flower bed.

• Approximately 25.12 feet

• Approximately 31.42 feet

• Approximately 18.84 feet

• Approximately 12.56 feet

A round clock has a diameter of 12 inches. What is the circumference in inches? (Use 3.14 for π)

• 40.00 inches

• 31.42 inches

• 25.12 inches

• 37.68 inches

If a hula hoop has a circumference of 24 inches, how many feet is that? (Hint: 1 foot = 12 inches)

• 3 feet

• 4 feet

• 2 feet

• 1 foot