Question

The volume of a sphere is 38808 cm. Find its radius and hence its
surface area.​

Answer 1

Step-by-step explanation:

r≈21

V Volume

38808

here is the ans

Answer 2

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Volume of sphere = $\frac {4}{3}πr^3$

38808 = $\frac {4}{3}× \frac { 22}{7} ×r^3$

11 × 3528 = $\frac {4}{3} ×\frac { 22}{7} ×r^3$

3528 = $\frac {4}{3} ×\frac { 22}{7} ×r^3$

9 × 882 = $\frac {4}{3}× \frac { 2}{7}× r^3$

$r^3 = 882 × \frac {21}{2} = 441 × 21$

= $21 × 21 × 21$

Hence, r = 21 cm

Now,

Surface area = $4πr^2$

= $4 × \frac {22}{4}× 21 × 21$

= $4 × 22 × 3 × 21$

= $88 × 63 = 5544cm^2$