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=(d)/(2)=(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