Question

The ratio of the diameters of two circles is 3:5. The circumference of the larger circle is approximately 113.1 m. What is the approximate circumference of the smaller circle?
7.5 m
22.6 m
67.9 m
188.5 m

Answer 1

circumference is directly proportional to diameter ( C = pi * d) so we can set up a proportion

smaller diameter/larger diameter = smaller circumference/larger circumference

and solve for the smaller circumference