There were a couple of right angles involved that could accurately integrate the volume of water without the use of calculus because the triangle shapes changed in a linear manner going from one side of the wagon to the other.Then it would just be a matter of dividing the water volume back into the total surface area of the bottom of the wagon to calculate the amount of rainfall.
Linear measurements in centimeters 3.1 48 74.4 area of smaller rectangle 4.3 74.5 160.2 area of larger rectangle 117.3 ave area of a triangle 35.3 Width of wagon Volume = Ave Area Triangle x Width of the Wagon 4140.2 volume of water cc 35.3 82 2894.6 sq cm area of bottom of wagon 1.430 cm, height of water distributed evenly 0.56 in, height of water distributed evenly
It rained about a half inch.
It still rained about half an inch.
Additional Additional Work
Yeah, pretty sure it rained about a half inch.