applications geometry

Question

Annie wants to eat an entire donut. However, since she only two-years-old, the mother says she can only have a third of the donut. If the diameter of the donut is 4 inches, how long is the outside edge of the piece that Annie gets to eat? Round your answer to the nearest hundredth of an inch.

Answer 1

circumference of the donut = 2pir = 2pi(4)

1/3 of the donut would have outer edge = 8pi/3 = (8/3)(3.14159) inches

= about 8.38 inches