Question

A circular mirror has a diameter of 30 inches and has a frame that is 3 inches thick. What is the circumference of the outer edge of the frame? Use 3.14 for π. Round to the nearest inch.

19 inches
113 inches
94 inches
104 inches

Answer 1

By definition, the circumference of a circle is given by:

`C = 2 \pi r`

Where,

r: radius of the circle.

We have then, that the radius of the outer circle is given by:

`r = 15 + 3`

`r = 18`

Then, replacing values we have:

`C = 2 (3.14) (18)`

`C = 113`

Answer:

The circumference of the outer edge of the frame is:

113 inches

option D