i need some help on how to do this (two column proofs)

Answer:
B = [tex]$ \frac{3V}{H} $[/tex]
Step-by-step explanation:
The formula for the volume of the pyramid is given as:
V = [tex]$\frac{1}{3} $[/tex]Bh
Multiplying 3 on both sides, we get:
3V = Bh
Assuming the height, h is not zero, we divide throughout by h.
⇒ [tex]$ \frac{3V}{h} = B $[/tex]
Hence, we arrive at a formula to find B = 3V/h.