What will be the difference between the total surface area and the curved surface area of a hemisphere having 4 cm diameter?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 4π cm2.
Diameter = 4 cm
The total surface area of a hemisphere = 3πr2
Curved surface area of a hemisphere = 2πr2
Required difference of the hemisphere = TSA - CSA
⇒ 3πr2 - 2πr2
⇒ πr2
⇒ π(22) = 4π