math thx!
2007-08-19 4:07 am
A, B, C have a total of 69 kg rice. If A has one third of the rice of B and B has 5 times as much as C. Find the amount of rice each person has.
回答 (2)
2007-08-19 4:14 am
✔ 最佳答案
Let the amount of rice C has be x kgx + 5x + 5x/3 = 69
3x + 15x + 5x = 207
x = 9
Therefore, A has15kg, B has 45kg and C has 9 kg.
參考: Own Calculation
2007-08-19 6:06 pm
Let x be the amount of rice C has, then B has 5x because B has 5 times as much as C. A has 5x/3 because A has one third of the rice of B.
They have a total of 69 kg rice,
so A+B+C=69
5x/3+5x+x=69
23x/3=69
x=69*3/23=3*3=9
C=9, B=9*5=45, A=5*9/3=45/3=15.
So,
A has 15 kg of rice, B has 45 kg of rice, C has 9 kg of rice.
They have a total of 69 kg rice,
so A+B+C=69
5x/3+5x+x=69
23x/3=69
x=69*3/23=3*3=9
C=9, B=9*5=45, A=5*9/3=45/3=15.
So,
A has 15 kg of rice, B has 45 kg of rice, C has 9 kg of rice.
參考: my brain, my hands
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070818000051KK04618