Didn’t he lateral area of the cone in terms of pi.

Question

asked Jan 23, 2020 167k views

2 Answers

Ivan Vinogradov · Answer 1 · 2020-01-25T23:58:23+0000

Answer: third option

Explanation:

To solve the problem you must apply the following formula for calculate the lateral area of a cone:

$LA=r*s*\pi$

Where r is the radius and s is the slant height.

As you can see in the figure:

$r=22in/2=11in\\s=26in$

Substitute values. Therefore, the result is:

$LA=11in*26in*\pi=286\pi$ in²

Djsadinoff · Answer 2 · 2020-01-27T18:31:51+0000

Answer:

$286\pi$ sq. in.

Explanation:

The lateral area of cone is given by the formula
$\pi r l$

Where,

r is the radius, and

l is the slant height

Diameter is given as 22. We know radius is half of diameter, so radius (r) is 11

Plugging all these values into the formula, we get:

Lateral Area =
$\pi r l=\pi (11)(26)=286\pi$