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Water is to be poured at a rate of 2. 5 gallons per minute into a 500-gallon tank that initially contains 50 gallons of water.
Water is to be poured at a rate of 2. 5 gallons per minute into a 500-gallon tank that initially contains 50 gallons of water.
admin
2009-05-19
54
问题
Water is to be poured at a rate of 2. 5 gallons per minute into a 500-gallon tank that initially contains 50 gallons of water.
Column A Column B
The percent of the tank’s capacity that 60 percent
will be filled 1 hour after water begins
to be poured in
选项
A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案
B
解析
水以每分钟2.5加仑的速度注入一个容量为500加仑的水箱中,且该水箱在注入水之前已装有50加仑的水。
解:本题的正确答案是(B)。比较的左项为水开始注入1小时后,水箱中的水将占水箱的容量的百分比:(50+2.5×60)/500=40%。注:未能做对该题的考生一般对都认为will be filled指1小时后水箱中有百分之几的容量还有待水的注入,这种理解是不对的。这里的will be filled一般将来时的使用是针对从句after water begins to be poured in中的begins这个一般现在时而言的,指开始注入水后的1小时,水箱中的水所占的水箱容量的比例。
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