If the ratio of the areas of two circles is 16:25 what will be the ratio of their circumference
The ratio between the volume of two spheres is 8:27. Find the ratio of their surface areas.
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Step-by-step explanation:
given
ratio of area of two circles=16/25
i.e., (πR^2)/(πr^2)=16/25
=(R/r)^2=(4/5)^2
R/r=4/5
Now, ratio of their circumference
2πR/2πr
=R/r
=4/5
ratio of the volume of two spheres=8:27
((4πR^3)/3)/(4πr^3)/3)=8/27
(R/r)^3=(2/3)^3
R/r=2/3
ratio of their surface area=
4πR^2/4πr^2
R^2/r^2
=2^2/3^2
=4/9
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