Answer:
40 and 202.5 m³
Explanation:
(7)
Since the figures are similar then the ratios of corresponding sides are equal, that is
=
( cross- multiply )
12 PQ = 480 ( divide both sides by 12 )
PQ = 40 in
-------------------------------------------------------------------
The volume (V) of a pyramid is calculated as
V =
Ah ( A is the area of the base and h the height ) , then
V =
× 9² × 7.5
=
× 81 × 7.5
= 27 × 7.5
= 202.5 m³