[Saloni Bhardwaj]

Length of rectangle=12 cm

Width of rectangle=(1/3)*length

= (1/3)*12

= 4cm

Area of the rectangle=length*width

= 12*4

= 48 cm sq

[Saloni Bhardwaj]

Circumference of a circle is given by: P=2*pi*radius

Area of a circle is given by: A=pi*radius^2

Given, area of the circle A=616 cm sq.

i.e. pi*radius^2=616

=> radius^2=196.078

=> radius=14 cm

Therefore,

Circumference=2*pi*14

=87.96 cm