Question

How can the surface area of the onion be approximated? 1) using the formula for the surface area of a cylinder 2) using the formula for the surface area of a cone 3) using the formula for the surface area of a sphere 4) using the formula for the surface area of a pyramid

Answer 1

Therefore, option 3 is correct

The surface area of an onion can be approximated by using the formula for the surface area of a sphere. This is because the general shape of an onion is spherical or at least closely resembles a sphere.

The formula for the surface area of a sphere is:

`\[ A = 4\pi r^2 \]`

where
`\( A \)` is the surface area and
`\( r \)` is the radius of the sphere.

Option 3) "using the formula for the surface area of a sphere" is the most appropriate method for approximating the surface area of an onion. Options 1), 2), and 4) represent shapes that do not closely resemble an onion's shape and would not provide a good approximation.