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END OF COURSE TEST

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a solid cone has a lateral surface area of 100 3.14 square centimeters and a total suface area of 269 3.14 square centimeters. find the base radius of the cone.
 Sep 13, 2013

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Base area = Total surface area - lateral surface area
= 269 Pi cm 2 - 100 Pi cm 2
= 169 Pi cm 2

Radius = sqrt( Base area / Pi )
= sqrt( 169 cm 2)
= 13cm
 Sep 13, 2013

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