find the curved surface area and the total surface area of a solid cone whose height is 28 cm and radius is 21 CM
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first you have to find the slant height
use the formula
l = √(h^2 +r^2)
= √(784+441)
35 cm
now use the formula
πrl for curved surface area,
and πr(r+l) for total surface area.
Hope it helps
use the formula
l = √(h^2 +r^2)
= √(784+441)
35 cm
now use the formula
πrl for curved surface area,
and πr(r+l) for total surface area.
Hope it helps
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