Question

The base radius and height of the cone is 21 cm and 28 cm respectively. Find volume of the cone.

Answer 1

Answer:

r = 21 cm

h = 28 cm

Volume of the cone = $1/3\pi r^{2} h$

                = 1/3 * 22/7 * 21 * 21 * 28

               = 12936 cm units

Step-by-step explanation:

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Answer 2

✬ Volume = 12936 cm³ ✬

Step-by-step explanation:

Given:

• Measure of radius of cone is 21 cm.
• Measure of height of cone is 28 cm.

To Find:

• What is the volume of cone ?

Solution: As we know that formula for find volume of cone is:-

★ Volume of Cone = 1/3πr²h ★

• Taking π = 22/7

$\implies{\rm }$ [ 1/3 $\times$ 22/7 $\times$ (21)² $\times$ 28 ] cm³

$\implies{\rm }$ [ 22/21 $\times$ 441 $\times$ 28 ] cm³

$\implies{\rm }$ 22 $\times$ 21 $\times$ 28 cm³

$\implies{\rm }$ 12936 cm³

Hence, the volume of cone is 12936 cm³.

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★ Other Formulae ★

➟ Curved Surface are of cone = πrl

➟ TSA of cone = πr ( l + r )