1. Use the net to find the surface of the cylinder.
about 273 m^2
about 179 m^2
about 302 m^2
about 151 m^2

Question

1. Use the net to find the surface of the cylinder.
about 273 m^2
about 179 m^2
about 302 m^2
about 151 m^2

anonymous · Answer

attachment

anonymous · Answer

Can you help?

jdoe0001 · Answer

notice the RADIUS of our circular top and circular bottom, is 3 units, meters in this case
so $\bf \textit{Area of a Circle}=2\pi r\qquad \textit{Area of a Circle}=2\pi \cdot {\color{red}{ 3}}$   we sum those 2 Areas first

jdoe0001 · Answer

so $\bf 2\pi \cdot {\color{red}{ 3}}+2\pi \cdot {\color{red}{ 3}}$   will be the Area of the circular top and bottom of the cylinder

jdoe0001 · Answer

ohh shoot wait a second

jdoe0001 · Answer

I got the wrong.... eqution there.. anyhow.. lemme fix that quick

anonymous · Answer

Alright.

jdoe0001 · Answer

$\bf \textit{Area of a Circle}=\pi r^2\qquad \textit{Area of a Circle}=\pi \cdot {\color{red}{ 3}}^2\ \quad \
\textit{sum of both circles will be }\pi \cdot {\color{red}{ 3}}^2+\pi \cdot {\color{red}{ 3}}^2$

anonymous · Answer

The answer I got is 113.04. But that can't be right considering it's not any of the answer choices.

jdoe0001 · Answer

so now to do the side of the cylinder, the long part
we know is 13 units high
so how long is it? 

well, it runs along the border of the circles atop and bottom
so is as long as the circles are

well, how long are the circles?    well $\bf \textit{circumference of a circle}=2\pi r\qquad \textit{circumference of a circle}=2\pi {\color{red}{ 3}}\ \quad \
\textit{so the long part is }2\pi {\color{red}{ 3}}\quad \textit{long and is }13\quad wide\qquad thus\ \quad \
\textit{Area of the side of the cylinder}=2\pi {\color{red}{ 3}}\times 13$

anonymous · Answer

So the answer would be 151 m^2?

jdoe0001 · Answer

https://www.google.com/search?client=opera&rls=en&q=(pi*3%5E2%2Bpi*3%5E2)%2B(2*pi*3*13)&sourceid=opera&ie=utf-8&oe=utf-8&channel=suggest

anonymous · Answer

Which means I would have to round it and then it would be 302 m^2. :)

anonymous · Answer

Correct?

jdoe0001 · Answer

well, sure if you want to round it up, yes

anonymous · Answer

Great! Thanks. :) Can you help with my two other questions?

jdoe0001 · Answer

well.. is easier if you post anew, thus more exposure and we can revise each other :)

anonymous · Answer

Alright!