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RoseWind [281]
4 years ago
9

I need help with this question please help

Mathematics
1 answer:
forsale [732]4 years ago
4 0

Answer:

<h2>282.857 in²</h2>

Step-by-step explanation:

The formula of a surface area of a cylinder:

S.A.=2\pi r^2+2\pi rH

r - radius

H - height

We have:

r = 5 in

H = 4 in

Substitute:

S.A.=2\pi(5^2)+2\pi(5)(4)=2\pi(25)+2\pi(20)\\\\=50\pi+40\pi=90\pi\ in^2

\pi\approx\dfrac{22}{7}

Substitute:

S.A.\approx90\cdot\dfrac{22}{7}=\dfrac{1980}{7}\approx282.857\ in^2

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