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What is the surface area of the cylinder with height 4 mi and radius 7 mi? Round your answer to the nearest thousandth.

Sagot :

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[tex]\blue{\textsf{\textbf{\underline{\underline{Question:-}}}}[/tex]

What is the surface area of a cylinder with height 4 mi and radius 7 mi?

[tex]\blue\textsf{\textbf{\underline{\underline{Answer and How to Solve:-}}}}[/tex]

[tex]\textsf{Formula for Surface Area of a Cylinder:-}[/tex]

[tex]\dashrightarrow\bigstar\boxed{\bold{A=2\pi rh+2\pi r^2}}\dashleftarrow[/tex]

Where

[tex]\bold{A=area}[/tex]

[tex]\bold{\pi =pi\:(3.14...)}[/tex]

[tex]\bold{r=radius}[/tex]

[tex]\bold{h=height}[/tex]

Given:-

[tex]\bold{r=4mi}[/tex]

[tex]\bold{h=7\:mi}[/tex]

Solving for Surface Area:-

[tex]\bf{A=2\pi (4)(7)+2\pi (4)^2}[/tex]

[tex]\bf{A=2\pi (28)+2\pi (16)}[/tex]

On further simplification,

[tex]\bf{A=56\pi +32\pi }[/tex]

Now we just add the pi's together:-

[tex]\bf{A=88\pi }[/tex]

And finally,

[tex]\dashrightarrow\bf{\underline{A=276.460\:mi^2}\dashleftarrow[/tex]

Good luck.

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