the ratio of suface areas of two spheres is 25:49. find the ratio between their radii
let the radius of 1st sphere = R
radius of 2nd sphere = r
given the ratio of surface areas = 25:49
(4*pi*R2)/(4*pi*r2) = 25/49
=> R2/r2 = 25/49
=> R/r = 5/7
therefore ratio of theri radii = 5:7
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