Question

10 ydFind the surface area of the closed hemisphere.Enter your answer in terms of A and rounded to thenearest tenth.The surface area is ]# yd? or approximatelyyd?

Answer 1

We have the following:

$A=2\cdot\pi\cdot r^2$

we have that the radius is half the diameter, therefore

$\begin{gathered} r=\frac{d}{2}=\frac{10}{2} \\ r=5 \end{gathered}$

replacing:

$\begin{gathered} A=2\cdot\pi\cdot5^2 \\ A=50\pi\cong157 \end{gathered}$

The surface area is 50*pi yd^2 or approximately 157 yd^2