75 units squared. separate the shapes into a rectangle and triangle, find the area of each, and add together
The answers is 2 x 3 x 6 = 36
If there are 4 pens there will be 1 pencil, if there is 1 pencil there will be 4 pens
If the ratio is factored to a number, let's say 3, then there will be 12 pens for every 3 pencils