3 years ago

Helppppppppppppp meeee plsssssss

Mathematics

1 answer:

Mama L [17]3 years ago

8 0

Answer:

Step-by-step explanation:

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forsale [732]

Answer:

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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