Find the total surface area of a closed hemisphere whose radius is 3.5 cm. (Use π=22/7)
Answer & explanation
Correct answer: option 3
We know that,
Total surface area of a closed hemisphere = 3πr2
Radius (r) of the hemisphere = 3.5 cm
According to the question,
= TSA = 3 × \(\frac{22}{7}\)× 12.25
= TSA = \(\frac{808.5}{7}\)= 115.5 cm2