2002
Mathematics
JAMB
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: 462 cm2
Explanation
Total surface area of hemisphere = half of TSA of sphere + circumference of circle = 2πr2 + πr2 = 3πr2 = 3 × (22)/7 × 72 = 462cm2
Total surface area of hemisphere = half of TSA of sphere + circumference of circle = 2πr2 + πr2 = 3πr2 = 3 × (22)/7 × 72 = 462cm2THIS WEEK's
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