Answer:
7.809167 g/cm^3
Explanation:
Okay. First, find the volume of the the cuboid.
V = L x W x H
Both bases are squares. 6 x 6 = 36. 36 x 9 = 324.
The Volume of the cuboid is 324 cm^3.
The density of the cuboid is .68 g/cm^3.
Multiply these values. 324 x .68 = 220.32
The mass of the cuboid is 220.32 g.
Subtract this from the total mass. 970 - 220.32 = 749.68.
The pyramid has a mass of 749.68 g.
Find the volume of the pyramid. 17 - 9 = 8.
8 is the perpendicular height.
8 x 36 = 288
288 / 3 = 96
The Volume of the pyramid is 96 cm^3.
Divide the bolded values.
749.68 / 96 = 7.809167 g/cm^3