數學注水及濃度問題 - 酒精
By Robert
at 2010-04-22T00:00
at 2010-04-22T00:00
Table of Contents
1.A水槽有水1557公升,B水槽有水597公升,A水槽每分鐘注水24公升到B水槽,多久之後兩水槽的水量會相等?2.海水中的言奮占3.75%,取4公升的海水加入6公斤的自來水,鹽的濃度會是多少?3.濃度75%的酒精250克與濃度65%的酒精150克,再加上多少克的水稀釋,最後的酒精濃度是65%?4.哥哥跑步的秒速5公尺,姊姊跑步的秒速3.75��
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酒精
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By Franklin
at 2010-04-26T18:14
at 2010-04-26T18:14
By Tristan Cohan
at 2010-04-26T11:10
at 2010-04-26T11:10
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