"Published in Newark, California, USA"
Building bricks are closely stacked in a pile 7 ft. high, 36 ft. long, and 12 ft. wide. If the bricks are 2 in. by 4 in. by 9 in., how many bricks are in the pile?
Solution:
To illustrate the problem, it is better to draw the figure as follows
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| Photo by Math Principles in Everyday Life |
Let n = be the number of bricks in a pile
V1 = be the volume of a brick
V2 = be the volume of a pile of bricks
The volume of a brick is equal to
The volume of a pile of bricks is equal to
In cubic inches, the volume of a pile of bricks is
Therefore, the number of bricks in a pile is
