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A liquid filter shaped as a right circular cone is shown below. If a similar cone has a slant height of 15 cm, what is its lateral area?
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since the cones are similar use the proportion to find the radius of the similar cone: 8/20 = x/15. once you find the radius of the similar cone you can find the surface area.
x must equal 6, so howw do I find the surface area of a cone with a slant height of 15 and a radius of 15?
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