Question

The curved surface area of a cone with base radius 7 cm is 550 cm². The slant height of the cone is ______.

विकल्प

• 25 cm

• 14 cm

• 20 cm

• 24 cm

Answer 1

The curved surface area of a cone with base radius 7 cm is 550 cm². The slant height of the cone is 25 cm.

Explanation:

The curved surface area of a cone = 550 cm²

Radius = 7 cm

The curved surface area of a cone = πrl

⇒ `550 = 22/7 xx 7 xx l`

⇒ 550 = 22 × l

⇒ l = `550/22`

⇒ l = 25

The slant height of the cone is 25 cm.