Find the area of each triangle and then add it up. As you are aware, to find the area of a triangle the equation is B times Height divided by 2. And to make it easier do the top left triangle and the top right triangle, add them together and then divide that by 2.
3/4 times 3/2 (reciprocal of the second fraction) is 9/8 gallons per minute. 5/8 times 2/1 (reciprocal of the second fraction) is 10/8 gallons per minute
