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jmc

geometry junior

Problem

A straight concrete sidewalk is to be feet wide, feet long, and inches thick. How many cubic yards of concrete must a contractor order for the sidewalk if concrete must be ordered in a whole number of cubic yards?
(A)
(B)
(C)
(D)
Solution
This is a yard by yard by yard sidewalk, so its volume in yards is Since concrete must be ordered in a whole number of cubic yards, we need .
Final answer
A