Like Mark said, try drawing a diagram. First draw the 100m tall square pyramid with base side lengths of s. Then notice some similar triangles relating half a side length of the base of the 100m pyramid and half a side length of the base of the missing 100m-75m = 25m tall pyramid. Use the formula for the volume of a square pyramid and your ratio of pay will be (Volume(100m tall) - Volume(25m tall))/(Volume(100m tall))
Scott F.
tutor
That would be true if we're talking about heights, but we're referring to the volumes. Also keep in mind that the dimensions of the square base of the missing 25m tall pyramid are different from s. In fact, the similar triangles indicate that the side length of this base is s/4.
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09/29/22
Jameson S.
Um, I think that'd be juist be 3/4..09/29/22