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

Question

asked Feb 11, 2019 223k views

2 Answers

Bradkratky · Answer 1 · 2019-02-16T07:11:29+0000

The circumference of the grape fruit is
$2\pi r=14$ , where
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
$62.39\;cm^2$ .