A solid cone has a lateral surface area of 100π square cm and a total surface area of 269π square cm. Find the base radius of the cone.?
2015-08-31 8:23 pm
Need help with math question, tried everything, couldn't figure out, any formulas or explanations would be nice!
回答 (1)
2015-08-31 8:29 pm
Let r cm be the base radius.
Base area = r² π
Base area = (269π - 100π) cm²
r² π = 169π
r² = 169
r = 13 or r = -13 (rejected)
The base radius = 13 cm
Base area = r² π
Base area = (269π - 100π) cm²
r² π = 169π
r² = 169
r = 13 or r = -13 (rejected)
The base radius = 13 cm
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