Question

Find the surface area of sphere of diameter 14 cm, 21cm, 3.5m

Answer 1

Answer:

1) 176 sq.cm

2) 264 sq.cm

3) 44 sq.m

Step-by-step explanation:

1) radius =14 cm

surface area of sphere = 4πr square

4 × 22/7 × 14

= 176 sq.cm

2) radius= 21 cm

surface area of sphere = 4 × 22/7 × 21

= 264 sq.cm

3) radius = 3.5 m

surface area of sphere = 4 × 22/7 × 3.5

= 44sq.m