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Find the curved surface area of a cone having base diameter 42 cm and height 20 cm. $\left(π=\frac{22}{7}\right)$ |
$1642 cm^2$ $1876 cm^2$ $1914 cm^2$ $2016 cm^2$ |
$1914 cm^2$ |
Given, Diameter of the cone = 42 cm Radius of the base of the cone = 21 cm l2 = r2 + h2 l2 = 212 + 202 l = 29 cm Curved surface area of cone = πrl \(\frac{22}{7}\) × 21 × 29 = 1914 cm2 |
