Question

Find the surface area and volume of a sphere whose radius is 21 cm.​

Answer 1

Answer:

surface area of sphere is= 5541.77

volume = 38792.39

Answer 2

Radius = 21 cm

$surface \: area = 4\pi \: r {}^{2}$

= 4 (22/7) 21×21 = 5544 cm²

$volume = \frac{4\pi \: {r}^{3} }{3}$

= {4 (22/7) * 21×21×21}÷3

= 38808 cm³