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3 years ago

15

A soft drink can has a diameter of 6 cm and a height of 11.5 cm. How much aluminum is used to make the can.

1 answer:

Kitty [74]3 years ago

3 0

If the can has a diameter of 6 cm, then it's radius is half that, or 3 cm.

$\bf \textit{surface area of a cylinder}\\\\
SA=2\pi r(h+r)~~
\begin{cases}
r=radius\\
h=height\\
-----\\
r=3\\
h=11.5
\end{cases}\implies SA=2\pi (3)(11.5+3)
\\\\\\
SA=6\pi (14.5)\implies SA=87\pi$

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