Question

The radius of two circles are r and 4r what will be
the ratio of their Area and perimeter.​

Answer 1

r1=r

r2=4r

area 1=πr²

area 2=π(4r)²

area 1/area 2=1/16

perimeter 1=2πr

perimeter 2=2π*4r

perimeter 1/perimeter 2=1/4