The slant height of a right circular cone is 6cm. If the total surface area of the cone is 51.84pi cm^2, find
(a) the radius of the cone
6 pi r+r^2 pi = 51.84 pi
點計?
Area n volume
2010-01-05 6:40 am
回答 (1)
2010-01-05 7:41 am
✔ 最佳答案
6 pi r+r^2 pi = 51.84 pir^2 + 6r - 51.84 = 0
r = 4.8 or r = -10.8(rej)
the radius of the cone is 4.8cm
收錄日期: 2021-04-13 17:02:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100104000051KK01764