Question

How to find the radius of cylinder when base area is given .​

Answer 1

Answer:

$\mathcal{ANSWER}$

$Base \: area=\pi \times r^{2}$

$\frac{base \: area}{\pi } = {r}^{2}$

$base \: area \div \frac{22}{7} = {r}^{2}$

$base \: area \times \frac{7}{22} = {r}^{2}$

$\frac{base \: area \times 7}{22} = {r}^{2}$

${therefore,}$

$r \: = \: \sqrt{ \frac{base \: area \: \times 7}{22} }$

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Answer 2

As we k know that :

Area of base of Cylinder = πr^2

So, we can find the radius from there.

For ex. If the area of base of a cylinder is 154 m^2

Then, According to the question :

$\pi {r}^{2} = 154 \\ \\ = > \frac{22}{7} \times {r}^{2} = 154 \\ \\ = > {r}^{2} = 49 \\ \\ = > r = 7$

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