Question

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

Answer 1

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.

Answer 2

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

Answer 3

Um... I got 19, 200

Answer 4

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

Answer 5

12

Answer 6

@kropot72

Answer 7

is that it or is there something next???

Answer 8

The slant height is 12 cm.