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OpenStudy (anonymous):
A birthday hat in the shape of a cone has a lateral surface of 100π cm2. The slant height is 25 cm. Find the radius of the hat.
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OpenStudy (cornzyblack):
Do you know the Lateral Surface Area formula ?
OpenStudy (anonymous):
No just the normal surface area
OpenStudy (cornzyblack):
Well lateral Surface area = pi * r * L r = RADIUS L = slant height making r subject of formula r = Lateral Surface area/ (pi * L) r = 100/ (Pi * 25)
OpenStudy (cornzyblack):
thats about 1.273 cm
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