Question

The circular opening of a vase has an inside diameter of 13.5 cm.

-13.5 c

What is the approximate area of this circular opening? (Use a = 3.14.)

Answer 1

`Area = 143cm^2`

Explanation:

Given

Shape: Opening of a circular vase

`Diameter =13.5cm`

`\pi = 3.14`

Required

Determine the area

This opening implies a circle; hence the area will be calculated using area of a circle.

`Area = \pi r^2`

Solve for radius (r)

`r = (d)/(2)`

`r = (13.5\ cm)/(2)`

`r = 6.75\ cm`

Substitute 6.75 for r in
`Area = \pi r^2`

`Area = 3.14 * 6.75^2`

`Area = 143.06625`

`Area = 143cm^2` --- Approximated