a and b are two circles . the radius of a is 5 times as large as the radius of b . what is the ratio between the areas of the circles ?
given : the radius of a is 5 times as large as the radius of b . = > r ( a ) = 5 r ( b ) . the radius are in ratio of 1 : 5 thus the area will be in the ratio of square of radius . 1 : 25 . hence d .
divide(multiply(const_pi, const_1), multiply(const_pi, power(5, const_2)))