the area of the base of right circular cone is 28.26 square cm. if its height is 4 cm. find its volume and curves surface area.
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Answer:
Volume=37.68 cubic cm
Curved surface Area=47.1 sq cm
Step-by-step explanation:
Givem,πr^2=28.26sq cm
r^2=28.26/π
=28.26/3.14
=9
So, r=3. h=4cm (Given)
Volume of Cone=1/3πr^2h
=1/3×3.14×9×4
= 37.68 cubic cm .
Also, Slant height l= Sqrt [4^2+3^2]
=5
Curved surface Area = πrl
= 3.14×3×5
=47.1 sq cm
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