The sides of the base of the steel bar are 5cm and 12cm, and the height is 2m

The sides of the base of the steel bar are 5cm and 12cm, and the height is 2m. What is the mass of this bar, if the mass of 1 cubic meter of steel is approximately equal to 7800 kg?

In order to solve this task and find out how much a given steel bar weighs, you first need to convert centimeters to meters. We know that 1 m = 100 cm.Let’s make an example:

5 cm = 5: 100 = 0.05 m;

12 cm = 12: 100 = 0.12 m;

Let’s find the volume of a steel bar:

0.05 * 0.12 * 2 = 0.012 m³;

Let’s find how much a given steel bar weighs. To do this, let’s make a proportion:

7800 kg – 1 m³;

x kg – 0.012 m³;

x = 7800 * 0.012: 1 = 93.6 kg.

Answer: This steel bar weighs 93.6 kg.