Question

Find the surface area of a cone with a diameter of 13 and a slant height of 5. (use 3.14 for pi) 234.72
433.28
198.75
734.76

Answer 1

The surface area of a cone is given by the formula: Sa=B+1/2*CL. Where B is the area of the base, C is the circumference , and L is the slant height.

Answer 2

To find the area of the base, since this is a cone, we use the formula for the area of a circle: pi*r^2. In this case r is 6.5.

Answer 3

The circumference is found using th formula: 2*pi*r. Again r=6.5

Answer 4

The slant height is given as being 5

Answer 5

so whats B?

Answer 6

B is the area of the base, the base of a cone is a circle, so B=pi*6.5^2

Answer 7

thank you :)