1) For every $1 profit, A gets $0.2, B gets $0.5 and C gets the rest. If
the profit is $3200, how much does C get?
2) A is twice as old as B and B is half as old as C. If the sum of their
ages is 65 years, how old is A?
F.1 數學2題
2008-03-08 6:25 pm
回答 (2)
2008-03-09 2:46 am
✔ 最佳答案
1) The amount of profit C gets for every $1 profit=$(1-0.2-0.5)=$0.3
The amount of profit C gets=$0.3x3200
=$960
2) Let the age of A be x.
The age of B= x/2
The age of C= (x/2)2
=x
So, x+x/2+x= 65
x =26
Therefore, A is 26 years old.
2008-03-08 6:33 pm
1) C will get : $3200*(1-0.2-0.5) =$3200*0.3 =960
2)由於A=2B and B=1/2C ，咁即係C亦等於2B，所以5B=65，B=13，咁A=2B，所以A=2*13=26
希望我無理解錯咗... ...
2)由於A=2B and B=1/2C ，咁即係C亦等於2B，所以5B=65，B=13，咁A=2B，所以A=2*13=26
希望我無理解錯咗... ...
參考: 自己
收錄日期: 2021-04-16 23:27:30
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080308000051KK00596