Question

The diameter of a sphere is 42 centimeters. Find the surface area to the nearesttenth.527.8 cm22770.9 cm22167.1 cm25541.8 cm2

Answer 1

the area of a sphere is: A=4 π R^2

where R= radius

So R= diameter/2

R= 21 cm

$\begin{gathered} A=4\pi\cdot(21)^2 \\ A=4\cdot3,14\cdot441 \\ A=5541,8 \end{gathered}$

So the answer is: 5541.8 cm2