Question

find the surface area of a sphere of radius 10.5 CM 5.6 CM 14 cm ​

Answer 1

Answer:

(1) Given,

radius (r) = 10.5cm

Now,

Surface area = 4πr²

= 4 × 22/7 × (10.5cm)²

= 4 × 22/7 × 110.25cm²

= (9702/7)cm²

= 1386cm²

(2) Given,

radius (r) = 5.6cm

Now,

Surface area = 4πr²

= 4× 22/7 × (5.6cm)²

= 4 × 22/7 × 31.36cm²

= (2759.68/7)cm²

= 394.24cm²

(3) Given,

radius (r) = 14cm

Now,

Surface area = 4πr²

= 4 × 22/7 × (14cm)²

= 4 × 22/7 × 196cm²

= (30184/7)cm²

= 4312cm²

HOPE IT HELPS YOU MATE