Answer:
5:7
Step-by-step explanation:
Let the radius of first hemisphere be 'r' units
Let the radius of second hemisphere be 'R' units
2 x \piπ x r^2 / 2 x \piπ x R^2 = 25 / 49
r^2 / R^2 = 25 / 49
r / R = 5 / 7
the ratio of radii is 5:7.
answer:
R : 8 , R: 11
explaination:
CSA OF HEMISPHERE IS ; 2[tex]\pi[/tex]r2
CSA of 1st hemisphere is in ratio of 2nd one
2[tex]\pi[/tex]r2:2[tex]\pi[/tex]r2
then 2 and pi will be cancelled rest is '' r ''square.
then find the squares of their 64 and 121
which 64= 8
121= 11
