Question

Find the surface area of a sphere of diameter 14 cm

`["Assume "pi=22/7]`

 

Answer 1

`"Radius (r) of sphere "= "Diamete"/2 = (14/2)cm = 7cm`

Surface area of sphere = 4πr²

`=[4xx22/7xx(7)^2]cm^2`

= (88 x 7)cm^2

= 616cm^2

Therefore, the surface area of a sphere having diameter 14 cm is 616 cm².