the radius of a cone is 5 cm and vertical height is 12 cm find the area of the covered surface
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c.s.a of cone =πrl
22/7.5.13.
1430/7
204.2 .
22/7.5.13.
1430/7
204.2 .
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HEY THERE!!
Given : radius of cone, r =5cm
Height of cone , h = 12cm
l^2 = r^2 +h^2
l^2 = 5^2 + 12^2
l^2 = 25 + 144
l^2 = 169
l = 13 cm
Lateral surrface area= pie r l
= 3.14× 5× 13 cm^2
= 204.1 cm^2
Total surface area = pie r ( r + l)
= pie r^2 + pie r l
= 3.14 × 5 × 5 + 204.1
= 16021.85 cm^2
THANK YOU
@SRK
Given : radius of cone, r =5cm
Height of cone , h = 12cm
l^2 = r^2 +h^2
l^2 = 5^2 + 12^2
l^2 = 25 + 144
l^2 = 169
l = 13 cm
Lateral surrface area= pie r l
= 3.14× 5× 13 cm^2
= 204.1 cm^2
Total surface area = pie r ( r + l)
= pie r^2 + pie r l
= 3.14 × 5 × 5 + 204.1
= 16021.85 cm^2
THANK YOU
@SRK
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