Solved Problem 09 | Rectangular Parallelepiped

Problem 9
A solid concrete porch consists of 3 steps and a landing. The steps have a tread of 11 in., a rise of 7 in., and a length of 7 ft.; the landing is 6 ft. by 7 ft. How much material was used in its construction?
 

09-concrete-proch.gif

 

Solution 9

 
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