A solid hemisphere has a radius of 7 cm. Find the total s...
A solid hemisphere has a radius of 7 cm. Find the total surface area.
400 cm2
462 cm2
66 cm2
308 cm2
Correct answer is B
Total surface area of hemisphere = half of TSA of sphere + circumference of circle
= 2πr2+πr2=3πr2
= 3×227×72=462cm2