Question

The aria of circle is 100 times the aria of another circle .what will be the ratio of their circumference

Answer 1

Answer:

Let the radii of two circles be r & R .

Ar(I circle) = 100 Ar(II circle)

πr² = 100πR²

r² = 100 R²

r/R = √100 = 10

Circumference of I circle =    2πr

Circumference of II circle      2πR

                                           = 10 : 1