What is the ratio of the area of Circle M to the area of Circle K?

Diamter of Circle M $=15$ feet, so Radius $=\frac{15}{2}=7.5$ feet

Area $=\pi(7.5)^2=56.25\pi$ square feet

Diameter of Circle K $=15+15=30$ feet, so Radius $=\frac{30}{2}=15$ feet

Area $=\pi(15)^2=225$ square feet

Ratio of Area of Circle M to Area of Circle K $=\frac{56.25}{225}=1:4$