The cost of painting the outer surface of cylindrical container A is $80. If the radiys of a similar container B is 2 times that of container A,what is the cost of painting the outer surface of container B?
更新1:
ans=$720..
急..Mensuration
2007-02-26 12:38 am
我想要條式呀..thx!!
The cost of painting the outer surface of cylindrical container A is $80. If the radiys of a similar container B is 2 times that of container A,what is the cost of painting the outer surface of container B?
The cost of painting the outer surface of cylindrical container A is $80. If the radiys of a similar container B is 2 times that of container A,what is the cost of painting the outer surface of container B?
回答 (1)
2007-02-26 12:53 am
✔ 最佳答案
Ratio of radius of container A : container B = 1 : 2So, the ratio of surface area of container A : container B = 1² : 2² = 1 : 4
The cost of painting the outer surface of container A is $80,
the cost of painting for the outer surface of container B will be $80 * 4
= $320
2007-02-25 21:04:55 補充：
answer is $720?IF the radius of container B is 3 TIMES (instead of 2 times) that of container A,the answer will be $720.Isn't it?
收錄日期: 2021-04-18 20:49:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070225000051KK03543