Surface Area of a Cone 11 inches by 81 inches Calculator
If the cone Radius 11 inches by height 81 inches is 3203.3605339 inches2.
The surface area of a cone is equal to the area of the base plus the area of the cone. If the cone Radius 11 inches by height 81 inches is 3203.3605339 inches2.
Surface Area of a Cone 11 in by 81 in in other units
| Value | unit |
|---|---|
| 0.0813654 | km2 |
| 0.0505582 | mi2 |
| 81.3653576 | m2 |
| 266.9467112 | ft2 |
| 3203.3605339 | in2 |
| 88.9822371 | yd2 |
| 8136.5357561 | cm2 |
| 81365.3575611 | mm2 |
Steps:
Given that Base radius(r) = 11 in and height(h) = 81 in
Surface Area of a Cone = $(π⋅(Radius))$⋅($(Radius)$ + $\sqrt{(Radius)^2+(Height)^2}$)
Substitute the values of the radius r = 11 in and height h = 81 in into the formula. Pi (π) is approximately equal to 3.14 .
$(π⋅(11))$⋅ $(11$ + $\sqrt{(11)^2 + (81)^2})$
Move 11 to the left of π.
$(11π)$⋅$ (11$ + $\sqrt{(11)^2 + (81)^2}$
Simplify each term
Raise 11 in to the power of 2 and 81 to the power of 2
$(11π)$⋅$ (11$ + $\sqrt{(121.0) + (6561.0)}$ in
Add 121.0 in and 6561.0 in
$(11π)$ in⋅$ (11$ + $\sqrt{(6682.0)}$ in
Multipy 11π in and 11 in
121.0π in + (11π . $\sqrt6682.0$)in
Put the value of $\sqrt6682.0$ = 81.7435013 in formula
121.0π in + (11π . 81.7435013) in
Mulitply the 11π and 81.7435013
121.0π in + (899.178514π)
Add 121.0π in and 899.178514π in
The result can be shown in multiple forms
Exact Form
Area = 1020.178514π in
∴ Surface Area of Cone 11 in by 81 in is 1020.178514π in2
Decimal Form
3203.3605339 in2
∴ Surface Area of Cylinder 11 in by 81 in is 3203.3605339 in2