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प्रश्न
The curved surface area of a right circular cone of radius 7 cm is 550 sq cm. The slant height of the cone is ______.
विकल्प
24 cm
25 cm
22 cm
20 cm
MCQ
रिक्त स्थान भरें
उत्तर
The curved surface area of a right circular cone of radius 7 cm is 550 sq cm. The slant height of the cone is 25 cm.
Explanation:
Given that, Curved Surface Area of a right circular cone = 550 sq. cm
Radius of a right circular cone, r = 7 cm
To Find: Slant Height of a right circular cone
Curved Surface Area of a right circular cone = πrl
550 = `22/7 xx 7 xx l`
550 = 22 × l
l = `550/22 = 25`cm
∴ Slant Height of a right circular cone, I = 25 cm
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