A circular drum has a radius of 12.25 inches. Karen wants to glue a ribbon around the edge of the drum. If Karen has exactly enough ribbon, which measurement is closest to the length of the piece of ribbon in inches? Explain why
To find the length of the ribbon needed to go around the edge of the circular drum, we can use the formula for the circumference of a circle. The formula is:
Circumference = 2 * π * Radius
Given that the radius of the drum is 12.25 inches, we can plug this value into the formula:
Circumference = 2 * π * 12.25
Using the approximation value of π as 3.14, we can calculate the circumference:
Circumference = 2 * 3.14 * 12.25
Circumference ≈ 77.05 inches
Therefore, the measurement closest to the length of the ribbon needed is approximately 77.05 inches.