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【OG20-P284-356题】
A conveyor belt moves bottles at a constant speed of 120 centimeters per second. If the conveyor belt moves a bottle from a loading dock to an unloading dock, is the distance that the conveyor belt moves the bottle less than 90 meters? (1 meter = 100 centimeters)
(1) It takes the conveyor belt less than 1.2 minutes to move the bottle from the loading dock to the unloading dock.
(2) It takes the conveyor belt more than 1.1 minutes to move the bottle from the loading dock to the unloading dock.
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题干:t<9000/(120*60)=1.25minutes?
条件1:t:<1.2,充分
条件2:t>1.1,不充分
题目讨论 (3条评论)

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Crystal8
我这个我题目的做题方法太费时了,我是按着选项把对应的长度求出来,有点麻烦⚠️这个题的解析不错,直接把题干中90米需要的时间求出来,后面就只要对比时间了,省时!
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0 回复 2021-11-20 21:38:22
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xdxcc
没看到单位
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0 回复 2019-07-07 21:49:17
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Clara少女
MORE THAN 都没看见,怀疑自己是不是瞎了
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0 回复 2017-11-01 18:55:32