Answer:
3x² cm³
Step-by-step explanation:
The formula for a square pyramid is
V= l²h/3 where l is the length of the square sides and h is the height of the pyramid.
Solving this for l = x cm and h = 9 cm we would have
Therefore, the volume in terms of x would be 3x²
Let the height of the rectangle = h
2b + 2h = 100
2(38) + 2h = 100
2h = 100 - 76
h = 12mm
area of rectangle = base x height
= 38 x 12
= 456mm²
8
a. 4