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Lady bird [3.3K]
3 years ago
12

A cylinder has a height of 11 inches and radius of 9 inches. Find the surface area of the cylinder in terms of π.

Mathematics
1 answer:
Ganezh [65]3 years ago
8 0
\bf \textit{surface area of a cylinder}\\\\
s=2\pi r(h+r)\quad 
\begin{cases}
r=radius\\
h=height\\
------\\
h=11\\
r=9
\end{cases}\implies s=2\pi (9)(11+9)
\\\\\\
s=18\pi (20)\implies s=360\pi
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Step 1:

Given total pounds of mixture = 12 pounds, cost of macadamia nuts per pound = $9, cost of almonds per pound = $5.25, total cost of mixture per pound = $7.75.

Let number of pounds of macadamia nuts be x and number of pounds of almonds be 12-x.

Step 2:

Form an equation using the above information.

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