The lateral area of a cone is 480 pi cm2. The radius is 40 cm. Find the slant height.

Question

kropot72 · Answer

The formula for the lateral area of a cone is
$$lateral\ area=\pi \times r \times l$$
where l = slant height
The formula can be rearranged to find the slant height in terms of the lateral area and the radius as follows:
$$l=\frac{lateral\ area}{\pi \times r}$$
Now you just need to plug the given values of lateral area and radius into the latter equation to find the slant height.

kropot72 · Answer

$$l=\frac{480\times \pi}{\pi \times 40}cm=you\ can\ calculate$$

anonymous · Answer

Um... I got 19, 200

kropot72 · Answer

$$l=\frac{480\times \pi}{\pi \times 40}=\frac{480}{40}cm$$
What do you get when 480 is divided by 40?

anonymous · Answer

12

anonymous · Answer

@kropot72

anonymous · Answer

is that it or is there something next???

kropot72 · Answer

The slant height is 12 cm.