Alex has a roll of paper that is in the shape of the right circular cylinder. It has a height of 28 cm and a diameter of 15.5 cm health Alex solve for the surface area use 3.14 for Tt
The formula for the surface area of a right circular cylinder is:
Surface Area = 2πr(h + r)
where:
r = radius of the cylinder
h = height of the cylinder
First, we need to find the radius of the cylinder. The diameter is 15.5 cm, so the radius is half of the diameter:
r = 15.5 cm / 2 = 7.75 cm
Now we can plug in the values into the formula:
Surface Area = 2 * 3.14 * 7.75 (28 + 7.75)
Surface Area = 2 * 3.14 * 7.75 (35.75)
Surface Area = 2 * 3.14 * 7.75 * 35.75
Surface Area = 487.695 cm²
Therefore, the surface area of the right circular cylinder is 487.695 cm².