早上水缸注满水后,白天用去了其中20%,傍晚又用去了27升,晚上用去剩下水的10%,最后剩下的水比半水缸多1升。问早上注入多少升水?(  ) A.87升...

作者: tihaiku 人气: - 评论: 0
问题 早上水缸注满水后,白天用去了其中20%,傍晚又用去了27升,晚上用去剩下水的10%,最后剩下的水比半水缸多1升。问早上注入多少升水?(  ) A.87升 B.100升 C.115升 D.120升
选项
答案 C
解析 根据题意设早上注入x升水,则,解得x=115升。
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