Answer 1

Radius(r) of sphere = 5.6 cm

Surface area of sphere = 4πr²

`=[4xx22/7xx(5.6)^2]cm^2`

= (88 x 0.8 x 5.6)cm²

= 394.24 cm²

Therefore, the surface area of a sphere having radius 5.6 cm is 394.24 cm².