Question

Find the surface area of a grapefruit with circumference of 14 cm

Answer 1

The answer is 62 cm^2!

Answer 2

The circumference of the grape fruit is
`2\pi r=14`, where
`r` is the radius. Solving for r,

`r=(7)/(\pi)`.

The surface area of a sphere with radius r is
`S=4 \pi r^2`. Substituting numerical value of r,

`S=4 \pi r^2 =4 \pi ((7)/(\pi) )^2 =62.39`.

The surface area of the grape fruit is
`62.39\;cm^2`.