Answer:
2,420,000 m³
Explanation:
You want the volume of a square pyramid 220 m on a side and 150 m high.
Volume
The volume of a pyramid is 1/3 the volume of a cuboid of the same dimensions.
V = 1/3LWH
V = 1/3(220 m)²(150 m) = 2420000 m³
The volume of the pyramid is about 2,420,000 cubic meters.
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Additional comment
The density of Egyptian limestone is between 2.4 and 2.7 g/cm³, so the mass of the pyramid is approximately 6 million metric tons. This is about 50% more than the most massive building built in modern times.