Can someone please help me? Its for 100%

Step-by-step explanation:

The surface area pf the given cone is,

SA = \pi rl+\pi r^{2}

where, r be the radius and

l be the slant height.

Now,

Taking, r = 9, l = 21 and π = 3.14 we get,

SA = (3.14)(9)(21)+(3.14)(5^2) sq cm

do the math

And the total surface area of the cone is: SA = πr 2 + πrl SA = π · r · (r + l) SA = π · 3 · (3 + 5.83) SA = 83.17 cm 2 Therefore, the total surface area of the cone is 83.17cm 2 Example 2: The total surface area of a cone is 375 square inches. If its slant height is four …

Step-by-step explanation:

answer: what do you mean