Question

The diameter of a right circular cylinder is 21 cm and its height is 8 cm. The volume of the cylinder is....???​

Answer 1

Answer:

$volume = \pi r {}^{2} h \\ = 3.14 \times \frac{21}{2} \times \frac{21}{2} \times 8 \\ = 2769.48$

Answer 2

$\huge \text{Given :-}$

The diameter of a right circular cylinder is 21 cm and its height is 8 cm.

$\huge \text{Have~to~Find :-}$

What's the volume of the cylinder?

$\huge \text{Calculation :-}$

As we know the formula of volume of cylinder.

Volume of cylinder — πr²h

where,

π = 22/7

" r " = 21/2 { Radius }

" h " = 8 { Height }

Therefore,

Substituting the values,

V = 22/7 × 21/2 × 8

➙ 22/7 * 10.5 * 10.5 * 8

➙ 2772 cm³

So,

✰ The volume is 2772 cm³

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Hope it's helpful :)