Question 36657This question is from textbook
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Lisa, Nicole and Amber are to mow a rectangular lawn that measures 100 feet by 120 feet. Lisa is going to mow one-third of the lawn by mowing a strip of uniform width around the outer edge of the lawn. What are the demensions of the lawn still to be mowed.
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This question is from textbook
Answer by checkley71(8403)   (Show Source):
You can put this solution on YOUR website! 100*120=12,000 SQUARE FEET FOR THE ENTIRE LAWN 1/3*12,000=4000 SQUARE FEET MOWED USING THE OUTER EDGE.
THE RATIO OF THE LAWN MEASUREMENTS IS 10/12 SO THE RAMAINING RECTANGLE MUST ALSO BE A 10/12 RATIO THUS 10X*12X=8000 OR 120X~2=8000 OR X~2=8000/120 OR 66 2/3 OR X=8.165 THUS THE CENTER 2/3 IS 10*8.165=81.65 FEET & 12*8.165=97.98 FEET.
PROOF 81.165*97.98=8000 OR 8000=8000
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