Question

diameter of the base of a cone is 10.5 cm and its slant height is 10 cm then curved surface area is...?​

Answer 1

Answer:

Diameter of the base =10.5cm

∴ Radius of the base (r)= 10.5/2 cm=5.25cm

Slant height (l)=10cm

∴ Curved surface area of the cone

=πrl= 22/7 ×5.25×10=165cm ²

Answer 2

$diameter \: of \: cone = 10.5cm$

$∴radius \: of \: cone = \frac{10.5}{2} = 5.25cm$

$slant \: height , \: l = 10cm$

$csa \: of \: cone = \pi \: rl$

$( \frac{22}{7} \times 5.25 \times 10)cm {}^{2}$

$( \frac{22}{7} \times \frac{525}{100} \times 10)cm {}^{2}$

$(22 \times \frac{75}{100} \times 10)cm {}^{2}$

$= 165m {}^{2}$

$Therefore, \: The \: curved \: surface \: area \: of \: the \: cone \: is \: 165m {}^{2} </strong></p><p><strong>[tex]Therefore, \: The \: curved \: surface \: area \: of \: the \: cone \: is \: 165m {}^{2}$