The total surface area of a hemispher is 75\(\pi cm^2\). Find the radius.
A
5.0 cm
B
7.0 cm
C
8.5 cm
D
12.0 cm
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
Total surface area of hemisphere is
3\(\pi r^2\) = 75\(\pi cm^2\)
\(r^2\) = \(\frac{75 \pi}{3 \pi}\)
\(r^2\) = 25
r = \(\sqrt{25}\)
r = 5cm
Source: Myschool Past Questions Archive (Record #49360)