A baker needs to cover a cylinder cake with icing. The cake has a radius of 5 inches and a height of 7 inches. How many square inches of icing will be needed to cover the sides and top of the cake? Ic
The surface area of the sides of the cylinder can be found by multiplying the height (7 inches) by the circumference of the circular base.
The circumference of the circular base can be found by multiplying the radius (5 inches) by 2π.
Circumference = 2 * π * radius = 2 * 3.14 * 5 = 31.4 inches
So, the surface area of the sides of the cylinder is 7 *31.4 = 219.8 square inches.
The surface area of the top of the cylinder is the same as the area of the circular base, which can be found by multiplying π by the square of the radius.
Area of the circular base = π * (radius^2) = 3.14 * (5^2) = 3.14 * 25 = 78.5 square inches.
The total surface area of the sides and top of the cake is 219.8 + 78.5 = 298.3 square inches.
Therefore, the baker will need 298.3 square inches of icing to cover the sides and top of the cake.