Final answer:
The volume of a pyramid with a square base is calculated using the formula V = (1/3) × l² × height, where l is the length of the base's side.
Step-by-step explanation:
The volume (V) of a pyramid with a square base can be calculated using the formula V = (1/3) × base area × height, where the base area is l² for a square base with side length l. In the case of the Great Pyramid of Giza, with a base side length of 813 feet, you would need to know the height of the pyramid to calculate its volume precisely. The volume given in the question, 2.946×10¹ litres, would be used to determine the pyramid's height if the base side length is already known.
The great pyramids are an engineering marvel and the Great Pyramid of Khufu has enthralled us for millennia as the tallest man-made structure in the world for almost four thousand years. It is indeed a testament to the ingenuity and organization of the Egyptian state during the Old Kingdom.