Question

8. The curved surface area of a right circular cone of slant height 10 cm and base radius 10.5 cm is
(a) 185 cm? (b) 160 cm? (c) 165 cm?
(d) 195 cm?​

Answer 1

diameter of the base = 10.5 cm

$radius \: of \: the \: base \: (r) = \frac{10.5}{2} cm$

= 5.25 cm slant height ( l ) = 10 cm

= Curved surface area of the cone = πrl

$\frac{22}{7} \times 5.25 \times 10 = {165 \: cm}^{2}$

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Answer 2

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