Question

If the surface area of two hemisphere are in the ratio of 25:49 find the ratio of their radii for classb9

Answer 1

Let the radius of first hemisphere be 'r' units

Let the radius of second hemisphere be 'R' units

 

Therefore,

2 x π x r² / 2 x π x R² = 25 / 49

⇒ r² / R² = 25 / 49

⇒ r / R = 5 / 7

 

∴ The ratio of radii is 5:7.

Hope This Helps :)