Algebra and Up:
Question: Darcy is decorating her bedroom and sketches a floor plan to a 1:12 scale. What is the area of the surface of a desk that is 31/2 inches long and 21/4 inches wide on Darcy's sketch?
Answer: 77/8 square feet
Solution: If the scale is 1:12, then 1 inch on the sketch represents 12 inches in the real world. So, an inch on the map is a foot in real life. The surface of the desk therefore has an area of 31/2 × 21/4 = 77/8 square feet.
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