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1.市場賣"李子一個10元,桃子一個30,梨子一個60元",媽媽想用1000元剛好買下這3種水果,且水果總數剛好是100個,請問他買李子,桃子,梨子各幾個?

2.現在煮"黃金蛋",需水煮雞蛋15分鐘,但手邊只有一個7分鐘的沙漏,還有一個11分鐘的沙漏,無其他計時器,請問應該如何兩個沙漏計時,才成完成"黃金蛋"

3.已知"柱體體積(容積)=底面積*柱高".
現在有3個圓柱桶底面正圓半徑分別10公分,15公分,20公分,柱高均為100公分.
(1)請問3個圓柱桶可裝水的容積比為多少?
(2)請問現將3個圓柱桶放於室外裝雨水1小時,已知雨水並未滿過桶子,請問此時3個圓柱桶內水高度比為多少?
(3)現將3個空的圓柱桶分別注入100公升的水.請問此時3個圓柱桶內水高度比為多少?

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