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| Math Central | Quandaries & Queries |
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Question from Sara: I have a spray rig that is 80' wide. How many feet must I go to have sprayed an acre? |
Hi Sara,
An acre is 43560 square feet and driving your spray rig $L$ feet creates a rectangle of width 80 feet and length $L$ feet. The area of a rectangle is the length times the width and hence you have
\[ L \times 80 = 43560 \mbox{ square feet.}\]
Solve for $L.$
Penny
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