Question

The total surface area of hemisphere is 300 πcm², then find its radius.

विकल्प

• 8 cm

• 12 cm

• 10 cm

• 9 cm

Answer 1

10 cm

Explanation:

Total surface area of a hemisphere = 3πr².

So, 3πr² = 300π

⇒ 3r² = 300

⇒ r² = 100

⇒ r = 10 cm (positive radius).