Question

The ratio of the C.S.A. of two hemispheres is 36:81.Find the ratio of their ratio.


plz it is urgent

Answer 1

Answer:

2:3

Step-by-step explanation:

We know CSA of hemisphere is 2*π*r^2

The ratio of the C.S.A. of two hemispheres is 36:81

let r1=36

r2=81

Ratio of CSA of hemisphere

2*π*r1^2/ 2*π*r2^2=36/81

r1^2/r2^2=36/81

r1/r2=6/9

r1/r2=2/3