Question

diameter of the base of a cone is 10.5cm and its slant height is 10cm.Find its curved syrface area​

Answer 1

Answer:

165 cm²

Step-by-step explanation:

curved surface area of cone = pi × r × l -----(1)

slant height (l) = 10 (given)

radius = 5.25 ( diameter is given = 10.5/2 =5.25)

pi = 22/7

put the values in 1

22/7×10×5.25

=165cm²

i hope it will help you

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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