A pyramid of height 500 ft has a square base 800 ft by 800 ft. Find the area ? at height ℎ. If the rock used to build the pyramid weighs approximately ?=100lb/ft3, how much work did it take to lift all the rock?

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter9: Surfaces And Solids
Section9.3: Cylinders And Cones
Problem 12E: Find the height of a storage tank in the shape of a right circular cylinder that as a circumference...
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A pyramid of height  500  ft has a square base  800  ft by  800  ft. Find the area  ?  at height  ℎ.  If the rock used to build the pyramid weighs approximately  ?=100lb/ft3,  how much work did it take to lift all the rock?

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