#15) The distance traveled from a wheel can be found using the circumference and the formula for that is 2*pi*radius
So the smaller one traveled 4*(2*pi*r) = 8*pi*r
And the larger one traveled 4*(2*pi*2r) = 16*pi*r
So the larger one traveled 8*pi*r feet further.
16) This is just a counting problem. The total number of people were: 250.
Each person got 3 flyers. So the total flyers is 250*3 = 750