SOLUTION: When the radius of a circle is multipled by 4, the area of the new circle is 40 in3. What was the area of the original circle?
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Question 320791: When the radius of a circle is multipled by 4, the area of the new circle is 40 in3. What was the area of the original circle? Found 2 solutions by Alan3354, solver91311:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Area is a function of the square of the radius.
4x the radius --> 16 times the area.
Original = 40/16 = 2.5 sq inches, not cubic inches
The areas of two circles are in proportion as the square of the ratio of their radii. Hence your new circle is times larger than the old circle. By the way, area is measured in square units, not cubic units.
