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4. The base diameter and height of a cone is \( 12 cm \) and \( 8 cm \), then find the curved surface area of the cone. |
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Answer» Given: d=12, r=6cm h=8cm We know that, CSA of cone= πrl l²= r²+ h² l²= 6² + 8²=10², l=10cm Therefore, CSA= 22/7 × 6 × 10= 188.57 cm² Given, The diameter of the cone is 12cm So the radius will be 12/2 = 6cm Height of the cone is 8cm C. S. A of cone= π r l Now, we have to find l So l²= r²+h² L²=6²+8² =36+64 =100 L=10 22/7 X 6 X 10 1320/7 188.571 |
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