Answer: It is either 0.13 or 13/100
First you need to know the weight in Kilograms of one liter of the substance. Then you multiply that number by 192. For example, water weighs 1 kg per liter. This is an easy conversion, with 192 liters of water weighing 192 kilograms. The weight varies by substance, though, so you need to look up how much what you want weighs.
You find the area not touched by the sprinkler by subtracting the area of the circle from the area of the square. The area of the square is 32*32 which is 1024. The area of the circle is found by multiplying 3.14 by the radius squared. Our radius is half the diameter of 32, so r = 16. A=3.14(16)(16) which gives us an area of the circle to be 803.84. Subtracting the 2 areas, square minus circle, is 1024-803.84=220.16 meters squared.