help with math question?

Question

the volume of a rectangular solid with a square base is 245cm3 if the height of the rectangular solid is 5 cm, what is the length of the square base?

Answer 1

We know that height * square base = volume

So,the square base = volume/height which is 49

Now,length²=square base

Then length=7(can't be negative)

Answer 2

V=length*width*height

square base means length=width, we will call this value s for side length

245cm³=(s²)*5cm

49cm²=s²

7cm=s