Question

concrete pillar is a cylinder with a radius of 20cm and a height of 2m. Find the volume of the pill​

Answer 1

Answer:

0.25

Step-by-step explanation:

volume of the cube is 22/7*radius*radius*hieght

hieght =2m

radius =0.2m

22/7*0.2*0.2*2

=0.25m cube= 250 litre

Answer 2

Given :

• Radius of the pillar = 20 cm
• Height of the pillar = 2 m

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To Find :

• Volume of the pillar = ?

$\\ \rule{200pt}{3pt}$

Solution :

✴ Formula Used :

• ${\underline{\boxed{\orange{\sf{ Volume \; of \; Cylinder = \pi {r}^{2} h }}}}}$

Where :

• ➻ ${\sf{ \pi }}$ = 3.14
• ➻ r = Radius
• ➻ h = Height

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✴ Calculating the Volume :

$\begin{gathered} \dashrightarrow \; \; \sf { Volume = \pi {(r)}^{2} h } \\ \end{gathered}$

$\begin{gathered} \dashrightarrow \; \; \sf { Volume = 3.14 \times {(20)}^{2} \times 2 } \; \; \; \; \; \; \bigg\lgroup {\purple{\sf{ 2 \; m = 200 \; cm }}} \bigg\rgroup \\ \end{gathered}$

$\begin{gathered} \dashrightarrow \; \; \sf { Volume = 3.14 \times 20 \times 20 \times 200 } \\ \end{gathered}$

$\begin{gathered} \dashrightarrow \; \; \sf { Volume = \dfrac{314}{100} \times 20 \times 20 \times 200 } \\ \end{gathered}$

$\begin{gathered} \dashrightarrow \; \; \sf { Volume = \dfrac{314}{\cancel{100}} \times 20 \times 20 \times \cancel{200} } \\ \end{gathered}$

$\begin{gathered} \dashrightarrow \; \; \sf { Volume = 314 \times 20 \times 20 \times 2 } \\ \end{gathered}$

$\begin{gathered} \dashrightarrow \; \; \sf { Volume = 314 \times 400 \times 2 } \\ \end{gathered}$

$\begin{gathered} \dashrightarrow \; \; \sf { Volume = 314 \times 800 } \\ \end{gathered}$

$\begin{gathered} \; \; {\qquad \; \; {\therefore \; {\underline{\boxed{\red{\pmb{\frak{ Volume = 251200 \; {cm}^{3} }}}}}}}} \\ \end{gathered}$

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✴ Therefore :

❛❛ Volume of the given concrete pillar is 251200 cm³ . ❜❜

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