Question

FIND THE RADIUS OF SPHERE WHOSE SURFACE AREA IS 154cm² ????​

Answer 1

Answer:

7 cm

Explanation:

πr²

3.14 x 7 x 7

or, 3.14 x 49

= 154 cm².

Answer 2

Answer:

r≈3.5cm

Explanation:

Let 'r' be the radius of sphere

 Surface area of sphere = 4πr2 

⇒ 154 = 4πr2   ⇒  154 = 4 x 22/7 x r2

⇒ r2  = 154 x 7/4 x 22 = 49/4

⇒ r = 7/2 cm   = 3.5 cm

Hope It Helps..