Question

diameter of Base of a cone is 10.5cm and slant height is 10cm.find it's curved surface area​

Answer 1

Step-by-step explanation:

Diameter of the base =10.5cm

∴ Radius of the base (r)=

2

10.5

cm=5.25cm

Slant height (l)=10cm

∴ Curved surface area of the cone

=πrl=

7

22

×5.25×10=165cm

2

Answer 2

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$\therefore$ Diameter of the base = 10.5cm

$\therefore$ Radius of the base(r) = $\large\dfrac{10.5}{2}$ cm

= 5.25cm

Slant height (l)=10cm

$\therefore$ Curved surface area of the cone = πrl

= $\large\dfrac{22}{7}$ × 5.25×10

= ${\large{\boxed{\sf{165cm²}}}}$

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