7038 square inches
Formula for Surface area is given by =
here radius (r) = 14 inches
height (h) = 66 inches
Surface area =
= 7038 square inches
C. 400 in^2
First find the surface area or the area of the base which is in the shape of a square and has a side length of 10 in. So square 10 to find the area.
Area of base: 10 * 10 = 100
Next find the area of one of the triangles.
As we could see the triangle has a slant height of 15 in and a base of 10. To find the area of a triangle we multiply the base times the height and multiply it by half.
Area of one triangle. 15 * 10 = 150 * 1/2 = 75
Since one side of the triangle has a surface area of 75 inches we will multiply it by 4 since there are four triangles to find the total surface area of the four faces.
75 * 4 = 300
We now know that the the 4 triangles surface area dd up to 300 so we will add it to the area of the base which is 100 to find the whole surface area of the figure.
300 + 100 = 400
I did the quiz.!
We have been given that a covered water tank is in the shape of a cylinder. The tank has a 28-inch diameter and a height of 66 inches. We are asked to find the surface area of the water tank.
We will use surface area of cylinder to solve our given problem.
SA = Surface area of cylinder,
r = Radius of cylinder,
h = Height of cylinder.
Radius of the given cylinder would be half the diameter that is inches.
Upon rounding to nearest square inch, we will get:
Therefore, the surface area of the water tank is approximately 7037 square inches.
A = 4 pi r^2
where pi = 3.1416
r is the radius
since diameter is given
r = d / 2
r = 16 / 2
r = 8
A = 4 pi (8^2)
A = 804 sq in is the surface area of the disco ball