What will be the difference between total surface area and curved surface area of a hemisphere having 2 cm diameter?

2π sq cm
3π sq cm
π sq cm
4π sq cm

Correct Answer: π sq cm

Explanation:

Given,
Diameter = 2 cm
∴ r = 1 cm
Now, Total surface area of hemisphere = 3πr²
and curved surface area = 2πr²
Required difference = 3πr² - 2πr² = πr²
= π x 1² = π sq cm

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