更新1:
咩係pi
數學..............
回答 (3)
2007-08-25 11:52 pm
✔ 最佳答案
首先,(5cm*5cm*pi)*4cm咁大o既圓柱體要$30,
即係(100*pi)cm^3咁大o既圓柱體要$30,
1cm^3就要 $30/(100*pi) 咁多錢.
r=4cm,h=6cm時餅的價格:
(4cm*4cm*pi)*6cm * [$30/(100*pi)]
= $28.8.
明唔明?
參考: myself~
2007-08-26 12:51 am
pi x (5)^2 x 4 =100pi
pi x (6)^2 x 4 =144pi
30 / 100pi x 144pi = $36
2007-08-25 16:53:29 補充：
pi x (4)^2 x 6 = 96pi30 / 100pi x 96pi = $28.8sor~
pi x (6)^2 x 4 =144pi
30 / 100pi x 144pi = $36
2007-08-25 16:53:29 補充：
pi x (4)^2 x 6 = 96pi30 / 100pi x 96pi = $28.8sor~
參考: /
2007-08-25 11:49 pm
pi x r^2 x h = price x k, where k is the constant
pi (5^2) (4) = 30k
k = 100pi / 30
= 10/3 pi
pi x r^2 x h = price x k
pi (4^2) (6) = price (10/3 pi)
price = 28.8
pi (5^2) (4) = 30k
k = 100pi / 30
= 10/3 pi
pi x r^2 x h = price x k
pi (4^2) (6) = price (10/3 pi)
price = 28.8
收錄日期: 2021-04-25 20:19:22
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070825000051KK02787