Explanation:
The volume of a pyramid is 1/3 bh
First step is to find the base
The area of a triangle is 1/2 bh
We have both b and h of the base triangle
Area of base = 16.5 cm^2
Now we can sub. that in with the volume formula
1/3 16.5 x 9
1/3 x 148.5
49.49999999999995