Question 1938 Deck Safety

The correct answer is A) 3/4" thick. The thickness of a 30-pound steel plate can be calculated based on the density of steel, which is approximately 0.284 pounds per cubic inch. Dividing the weight of the plate (30 pounds) by the density of steel gives the volume of the plate, which is approximately 105.63 cubic inches. Assuming the plate is square, the thickness of the plate can be calculated by taking the cube root of the volume, which is approximately 0.75 inches or 3/4 inch. The other options are incorrect because: B) 3/8" thick would result in a plate that weighs only about 15 pounds. C) 1" thick would result in a plate that weighs approximately 42 pounds. D) 1/2" thick would result in a plate that weighs only about 21 pounds.