Question

find the area of cylinder whose radius=height=21​

Answer 1

Answer:

2pie rh+ 2pie R2

2×22/7×21+2×22/7×21 square

2904 m

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Correct Question:-

Find volume of the Cylinder whose radius=height=21units

Given:-

In a cylinder

• radius=height=21units

To find:-

Volume of th e Cylinder

Solution:-

Radius=r=21units

Height=h=21units

We know that in a cylinder

$\boxed{\sf Volume=\pi r^2h}$

$\\ \sf{:}\longrightarrow Volume_{(Cylinder)}=\dfrac{22}{7}\times (21)^2\times 21$

$\\ \sf{:}\longrightarrow Volume_{(Cylinder)}=\dfrac{22}{\cancel{7}}\times 441\times \cancel{21}$

$\\ \sf{:}\longrightarrow Volume_{(Cylinder)}=22\times 441\times 21$

$\\ \sf{:}\longrightarrow Volume_{(Cylinder)}=9702\times 21$

$\\ \sf{:}\longrightarrow Volume_{(Cylinder)}=203742 units^2$