Question

If the radius of sphere is 3r ,then find its volume

Answer 1

Hlo friend.. Cutiepie Here..

Here is ur answer :

Radius r of sphere = 3r

Volume of sphere :

$= \frac{4}{3} \times \pi \times {(radius)}^{3}$

$= \frac{4}{3} \times \pi \times {(3r)}^{3}$

$= \frac{4}{3} \times 27\pi {r}^{3}$

$= \frac{108 \pi {r}^{3} }{3}$

$= 36 \pi {r}^{3}$

$= 36 × 3.14 × {r} ^{3}$

$= 113.04 {r} ^{3}$

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HOPE IT HELPS YOU..

Answer 2

Hey friend, Harish here.

Here is your answer:

Given that, 

$Radius = 3r$

We know that,

⇒ $Volume = \frac{4}{3} \pi (3r)^{3}$

                 $= \frac{4}{3} \pi 27r^{3}$
 
                 $= 4 \times9 \pi r^{3}$
 
                 $= 36 \pi r^{3}$
 
                 $= 36 \times 3.14 \times r^{3}$
 
                 $= 113.04 r^{3}$
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Hope my answer is helpful to u.