crystal1
Two similar cones are shown in the image below.
What is the approximate surface area of the larger cone?
1544.4 square yards
978.5 square yards
2,162.3 square yards
1,103.1 square yards
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crystal1
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across
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This is a proportion problem; you need to know how to set up a proportion to estimate the radius of the larger cone. You also need to know how to compute the surface area of a cone. Where are you stuck?
crystal1
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everything
crystal1
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@bngaure @bobbylynn @EsmeraldaT @eliassaab @Emily_Martin_14 @RioAnne
across
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I'll give you a hint: the surface area of a cone is\[SA=\pi r^2+\pi rl,\]where|dw:1346792025872:dw|
across
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That's about half of the problem right there, and what do you mean with "everything"?
Emily_Martin_14
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why did you tag me in this?
crystal1
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cause i need helpppppppppppppppppppppppppppppppppppppppppp
Emily_Martin_14
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oh k well im really sorry i dont know this :( do you have a formula for finding the surface of a cone?
across
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Sometimes I really wonder if people can see my posts, lol.
Emily_Martin_14
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lol
crystal1
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how you do that!!!!!!
Emily_Martin_14
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@crystal1 the other girl across is helping you find the answer
Emily_Martin_14
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@crystal1 umm what grade r u in?
crystal1
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10
Emily_Martin_14
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oh thats why i dont understand it in only in 9th
crystal1
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lol
across
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I don't think @crystal1 wants my help. <:) Oh well, good luck!
crystal1
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yes i do
Emily_Martin_14
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well take her help and work it out