Circumference Calculations: Fun Real-Life Problems

A circular garden has a radius of 5 meters. What is the circumference of the garden? (Use C = 2πr)

• 15 meters

• 25π meters

• 10 meters

• 10π meters

A bike tire has a diameter of 26 inches. How far does the bike travel in one complete rotation of the tire? (Use C = πd)

• 90.12 inches

• 85.00 inches

• 81.64 inches

• 78.54 inches

A round swimming pool has a circumference of 31.4 meters. What is the radius of the pool? (Use C = 2πr)

• 10 meters

• 5 meters

• 3 meters

• 7 meters

You are making a circular pizza with a diameter of 12 inches. What is the circumference of the pizza? (Use C = πd)

• Approximately 25.1 inches

• Approximately 37.7 inches

• Approximately 31.4 inches

• Approximately 45.0 inches

A circular track has a radius of 10 meters. If a runner completes one lap, how far do they run? (Use C = 2πr)

• 50 meters

• 75.4 meters

• 62.83 meters

• 31.42 meters

A hula hoop has a circumference of 94.2 centimeters. What is the diameter of the hula hoop? (Use C = πd)

• 35 cm

• 30 cm

• 40 cm

• 25 cm

A circular fountain has a radius of 3 feet. How much fencing is needed to go around the fountain? (Use C = 2πr)

• 3π feet

• 9π feet

• 12 feet

• 6π feet

You want to create a circular flower bed with a circumference of 62.8 feet. What is the radius of the flower bed? (Use C = 2πr)

• 10 feet

• 20 feet

• 15 feet

• 5 feet

A circular clock has a diameter of 18 inches. What is the circumference of the clock? (Use C = πd)

• 72.00 inches

• 45.24 inches

• 36.18 inches

• 56.52 inches

A round table has a circumference of 31.4 inches. What is the radius of the table? (Use C = 2πr)

• 5 inches

• 6 inches

• 4 inches

• 7 inches