To find the height, you will utilize the formula for area of a trapezoid. Â A = h(b1 +b2)/2. Â h is the height, b1 is the the first base, and b2 is the second base. Â When you substitute the information given to us in the question, the equation that needs solved is 37.4 = h(6.4 + 12.3)/2. Â You should multiply both sides by 2 to undo the dividing by 2. Â This gives you 74.8 = h (18.7). To solve for the height, divide both sides by 18.7. Â This gives us a cross sections height of 4 meters. Â This is the answer!