Boys to girls is 4:5.......added = 9
so 4/9 are boys and 5/9 are girls
Split the shape in 3 rectangles
4x2=8x2= 16 ( the bottom and top rectangle)
6x2= 12 (middle rectangle)
16+12=28
if there's 1 boy to every 4 girls, there's going to be 5 boys for every 20 girls
