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Question
The curved surface area of a cone with base radius 7 cm is 550 cm2. The slant height of the cone is ______.
Options
25 cm
14 cm
20 cm
24 cm
MCQ
Fill in the Blanks
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Solution
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.
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