Question

13. The surface area of sphere is
10182/7 cm square. Then its radius.​

Answer 1

Answer:

Step-by-step explanation:

Given surface area of the sphere = 1018  2/7 cm² ,

⇒ 4πr² = 1018  2/7 ,

⇒ 4 × 22/7 r² = 7128/7 ,

⇒ 88/7× r² = 7128/7 ,

⇒   r² = (7128/7) × (7/88) ,

⇒   r² = 7128/88 ,

⇒   r² = 81 ,

⇒   r = √81 = 9 ,

∴Radius = 9cm.

Hope it helps