Question

Answer Fast !!

If the Volume of a Cylinder is 441 π cm^3 and height is 9 cm , then its Radius is ?​

Answer 1

Given :

• Volume of Cylinder is 441π cm³ .
• Height of Cylinder is 9 cm.

To Find :

• Radius of Cylinder

Solution :

$\longmapsto\tt{Height=9\:cm}$

Using Formula :

$\longmapsto\tt\boxed{Volume\:of\:Cylinder=\pi{{r}^{2}h}}$

Putting Values :

$\longmapsto\tt{441{\cancel{\pi}}={\cancel{\pi}}\times{{r}^{2}}\times{9}}$

$\longmapsto\tt{441=9{r}^{2}}$

$\longmapsto\tt{\cancel\dfrac{441}{9}={r}^{2}}$

$\longmapsto\tt{r=\sqrt{49}}$

$\longmapsto\tt\bf{r=7\:cm}$

So , Radius of Cylinder is 7 cm..

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• C.S.A Of Cylinder = 2πrh
• T.S.A of Cylinder = 2πr(r+h)
• Volume of Cylinder = πr²h

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