Question

the surface of two hemispheres in the ratio 25 :49 find the ratio of their radius

Answer 1

We know that,

Surface Area of two hemispheres = 25 : 49 .

Let the radii be a, b respectively.

4π(a) ² : 4π(b) ² = 25 : 49

a² : b² = 25 : 49

a : b = 5 : 7 .


Therefore, The ratio of radii is 5 : 7

Answer 2

Heya.......!!!!

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We know that : Surface area of Hemisphere = 4πr ²


Given in the Question :--

ratio of surface area of Hemisphere = 25 : 49 .

we have to find ratio of their Radius .

So ,, let the radius be ' x ' and ' y ' respectively.

=> 4πx ² : 4πy ² = 25 : 49

=> x ² : y ² = 25 : 49

=> x : y = √25 : √49

➡ x : y = 5 : 7 is the ratio of their radius .


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Hope It Helps You ^_^