A rectangular retaining wall has an area of 240 square feet above ground and a length of 40 feet. The blocks used are 18 inches wide, 12 inches deep, and 6 inches high. The footer must contain 6 inches of crushed stone on the bottom, then 2 inches of stone dust, and one run of blocks with its top at ground level. a. How high is the wall? b. How many blocks are in the wall above ground? c. How many blocks are in the ground?
A rectangular retaining wall has an area of 240 square feet above ground and a length of 40 feet. The blocks used are 18 inches wide, 12 inches deep, and 6 inches high. The footer must contain 6 inches of crushed stone on the bottom, then 2 inches of stone dust, and one run of blocks with its top at ground level. a. How high is the wall? b. How many blocks are in the wall above ground? c. How many blocks are in the ground?
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter8: Areas Of Polygons And Circles
Section8.1: Area And Initial Postulates
Problem 25E: The exterior wall the gabled end of the house shown remains to be painted. a What is the area of the...
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