Area of two circle are in the ratio of 39:49. Find their ratio of perimeter
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Soln:-
Let the radius of 1st and 2 nd circle be R and r respectively
Now,
πR^2/πr^2=39/49
=>R^2/r^2=39/49
=>R/r=√39/7
Now,
2πR/2πr
=R/r
=√39/7
Let the radius of 1st and 2 nd circle be R and r respectively
Now,
πR^2/πr^2=39/49
=>R^2/r^2=39/49
=>R/r=√39/7
Now,
2πR/2πr
=R/r
=√39/7
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