A solid hemisphere has a radius of 7 cm. Find the total surface area.
-
A.
400 cm2 -
B.
462 cm2 -
C.
66 cm2 -
D.
308 cm2
Correct Answer: Option B
Explanation
Total surface area of hemisphere = half of TSA of sphere + circumference of circle
= (2pi r^{2} + pi r^{2} = 3pi r^{2})
= ( 3 times frac{22}{7} times 7^{2} = 462cm^{2})