Question
The radius of a cone is 10.5 cm and the area of the
curved surface is 396 cm². Find it's slant height. Take π = 22/7Solution
Radius =10.5cm. Curved surface area =396 cm² Curved surface area= π rl 22/7 ×10.5×l =396 l =18×7/10.5 =12cm
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