## mrs.perkins 3 years ago What is the lateral area of a cylinder whose diameter is 4 cm and whose height is three times the radius. Use 3.14 for .

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2. mrs.perkins

3. across

You want to find the lateral area of a cylinder. To do that, you will need two things: the width and the height of its rectangular segment. You're told that the diameter of the cylinder is $$4$$, and that its height is three times its radius. The radius of the cylinder is thus $$2$$, and its height ends up being $$h=6$$. Now you need to find one thing: the width of the rectangle (you already know the height, which is $$6$$). To do this, you have to use the formula$w=2\pi r,$where $$w$$ is the width, and $$r$$ is the radius. Finally, you multiply $$w$$ by $$h$$ to obtain your solution. If you're having trouble, let us know.

4. mrs.perkins

i am. i just need the answer

5. across

6. Champs

80pi

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8. No-data

$A = 6\pi r^2$

9. No-data

She told you how to get the value of r.