If diameter of a cone is 12 cm. and its height 8 cm. then find the total surface area of
cone.
Answers
Answer:
see below
please
Step-by-step explanation:
r= 12/2= 6 cm. , h = 8 cm. , l=√(r^2+h^2)= √(6^2+8^2) = 10 cm.
Total surface area of a cone = π.r.(l+r) units ^2.
= (22/7).6.(10+6) cm^2/
= 2112/7 cm^2.
= 301.714 cm^2. Answer.
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Given: Diameter of a cone= 12 cm
Height of the cone= 8 cm
To Find- Total surface area of the cone.
Solution:
For finding the total surface area, we need the radius and slant height of the cone.
Assuming the radius of the cone to be 'r' cm.
Radius=
=
= 6cm
Assuming the slant height of the cone to be l.
Slant height= cm
⇒ l=
=
=
= 10 cm
∴ Total surface area= πr ( l + r )
= 6π (10+6)
= (6π 16)
= 96π
Answer: The total surface area of the cone is 96π .