问题标题:
求问GRE1Maryreadfromthetopofpage10tothebottomofpage24in30minutes.Atthisrate,howlong,inminutes,willittakehertoreadfromthetopofpage25tothebottomofpage50?2比较大小Thevolumeofasolidcubewhosetotalsur
问题描述:

求问GRE

1Maryreadfromthetopofpage10tothebottomofpage24in30minutes.Atthisrate,howlong,inminutes,willittakehertoreadfromthetopofpage25tothebottomofpage50?

2比较大小Thevolumeofasolidcubewhosetotalsurfaceareais24与Thevolumeofa3-Drectangularsolidwhosetotalsurfaceareais25

孙春凤回答:
  30分钟读了15页,2分钟读1页;读26页需要26*2=52分钟.   正方体表面积是24,边长为2,体积为8;长方体表面积是25,可假设长2宽2高17/8,这样体积2*2*17/8>8=2*2*2;后者大.
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