一满杯纯牛奶,喝去20%后用水加满,再喝去60%。此时杯中的纯牛奶占杯子容积的百分数为( )。A. 52% B. 48% C. 42% D. 32%

作者: tihaiku 人气: - 评论: 0
问题 一满杯纯牛奶,喝去20%后用水加满,再喝去60%。此时杯中的纯牛奶占杯子容积的百分数为( )。
选项 A. 52% B. 48% C. 42% D. 32%
答案 D
解析 一杯纯牛奶喝去20%后,还剩80%的纯牛奶,用水加满后,再喝去60%,那么又喝去了 80%X60%=48%的纯牛奶,还剩下32%的纯牛奶。故正确答案为D选项。
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