Question

A hemisphere has curve surface area of 400 cm^2. Then radius??? ​

Answer 1

${\red{\underline{\underline{\bold{\huge{Given:-}}}}}}$

✏ Curved surface area = 400 cm^2

✧ We have to find out it's radius.

${\red{\underline{\underline{\bold{\huge{Solution:-}}}}}}$

___________⋆___________

CSA of hemisphere = 2πr^2

___________⋆___________

⟹ 2πr^2 = 400

⟹ r = 7.98 cm

Therefore,

Radius of hemisphere ☞ 7.98 cm.

${\blue{\underline{\underline{\bold{\huge{More - Information :-}}}}}}$

★ Total surface area of hemisphere = 3πr^2

★ Volume of hemisphere = ⅔ πr^2

${\huge{\mathcal{\blue{Hope \ It's \ Helpful..!!!}}}}$

Answer 2

Given :

• A hemisphere has curve surface area of 400 cm².

To Find :

• The radius = ?

Procedure :

Let the radius of hemisphere be r cm.

➪ CSA of hemisphere = 2πr²

➪ 2πr² = 400

➪ 2 × 22/7 × r² = 400

➪ r² = 400 × 7/2 × 22

➪ r = 7.98 cm

Hence, the radius of hemisphere is 7.98 cm.