Find the CSA of cone if it's slant height is 21m and diameter of it's base is 24m
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EXPLANATION.
Slant height of a cone = 21 m.
Diameter of its base of cone = 24 m.
As we know that,
Diameter = 2 x radius.
radius = Diameter/2.
radius = 24/2 = 12 m.
Radius of its base of cone = 12 m.
Formula of :
Curved surface area of cone = πrl.
Using this formula in the equation, we get.
⇒ 22/7 x 12 x 21.
⇒ 22 x 12 x 3 = 792 m².
Curved surface area of cone = 792 m².
MORE INFORMATION.
(1) Volume of cuboid = L x B x H.
(2) Volume of cube = a³.
(3) Volume of cylinder = πr²h.
(4) Volume of cone = 1/3πr²h.
(5) Volume of sphere = 4/3πr³.
(6) Volume of hemisphere = 2/3πr³.
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