SOLUTION: a 4-foot length of stone curbing contains 3840 cubic inches. if its width is 5 times its thickness, find these dimensions using quadratics.
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Question 1085217: a 4-foot length of stone curbing contains 3840 cubic inches. if its width is 5 times its thickness, find these dimensions using quadratics.
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
Volume of a rectangular box:
L × W × h = V
using your numbers:
48 × 5 × h × h = 3840
240 × h^2 = 3840
h^2 = 3840/240 = 16
h = sqrt16 = 4
------------------------
dimensions:
length: 48 inches (4 foot)
width: 5 × 4 = 20 inches
height (thickness) = 4 inches
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