How much sand is needed to fill a pit that measures 8 meters deep, 10 meters wide, and 15 meters lon

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How much sand is needed to fill a pit that measures 8 meters deep, 10 meters wide, and 15 meters long? Explain your answer.

The pit is a rectangular solid. The volume is:
V = l * w * h
V = 15 * 10 * 8
V = 1,200 cubic meters