Linda is building steps for her porch. What is the volume of the steps? 144,000 cm3
288,000 cm3
324,000 cm3
540,000 cm3

The volume of the steps is:

Step-by-step explanation:

Remember that the volume regularly is:

There are many forms to solve this exercise, but I'll show you two:

1. Imagine that aren't steps but a big solid, then its volume would be:

Now you can subtract the volume of a small solid with measures 30 cm * 30 cm * 120 cm (where is the blank for the step):

Now you subtract:

2. The building steps are formed by three solid with volume 30 cm * 30 cm * 120 cm, so:

where is the triangle?