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The curved surface area of a cone is 4070 cm2 and its diameter is 70 cm. What is its slant height? |
Answer» C.S.A. of a cone = πrl = 4070 cm2 Diameter of the cone (d) = 70 cm Radius of the cone = r = d/2 = 70/2 = 35 cm Let its slant height be ‘l’. By problem, πrl = 4070 cm2 22/7 × 35 × l = 4070 110 l = 4070 l = \(\frac{4070}{110}\) = 37 cm ∴ Its slant height = 37 cm. |
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