43. Translate the following:
"The internal length, width, and height of a tea box are 7.5 decimeters, 6 decimeters, and 5.4 decimeters respectively. The weight of the box when filled with tea is 52 kilograms 350 grams. But when empty, the box weighs 3.75 kilograms. Determine the weight of tea per cubic decimeter."
45. The length, width, and height of a cuboidal room are respectively \(a\), \(b\), and \(c\) units, and given that \(a + b + c = 25\) and \(ab + bc + ca = 240.5\), what is the length of the longest rod that can be placed inside the room?