Check the solution to "What is the surface area of this cylinder?..."

Tammy Fisher

Answered question

2021-11-23

What is the surface area of this cylinder?

Use

π \approx 3.14

and round your answer to the nearest hundresth.
What is the surface area of this rectangular pyramid?

Answer & Explanation

Elizabeth Witte

Beginner2021-11-24Added 24 answers

ans.
Total surface area of given cylinder $= 2 π γ h + 2 π γ^{2}$
Radius of given cylinder $= \frac{154}{2} = 77$ in
By Putting values in formula $c ∴$
$\Rightarrow 2 \times 3.14 \times 77 \times 56 + 2 \times 3.14 \times 77 \times 77$
$\Rightarrow 27079.36 + 37234.12$
$\Rightarrow 64313.48 i n^{2} \Rightarrow 64313 i n^{2}$
$\Rightarrow s u r f a c e a r e a o f g i v e n p y r a m i d = 2 b s + b^{2}$
b=length of base
s=slent height
By Putting values in formula $c ∴$
$\Rightarrow 2 \times 31 \times 57 + 31 \times 31$
$\Rightarrow 3534 + 961$
$\Rightarrow 4495 y d^{2}$

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