A cuboid steel is 4.8m long, and its cross section is a square with 5cm side length?

4.8m=480cm
5 × 5 × 480 = 12000 cm3
12000 cubic centimeter = 12 cubic decimeter
7.8 × 12 = 93.6kg

A cuboid steel is 4.8m long and its cross section is a square with 5cm side length. It is known that each cubic decimeter of steel weighs 7.8kg. How many kilograms are there in this steel?

4.8m = 480cm
Volume = 5 × 5 × 480 = 12000 cubic centimeter = 12 cubic decimeter
Mass = 12 × 7.8 = 93.6kg

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