there are 10 liters of alcohol in a container .after pouring out one liter ,fill it up with somewater;then repeat the experiment twice .what is the concentration of alcohol in the container now?
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there are 10 liters of alcohol in a container .after pouring out one liter ,fill it up with some
water;then repeat the experiment twice .what is the concentration of alcohol in the container now?
第一次后:10升剩下九升,加水浓度为90%;
第二次后:倒出的1升含有90%酒精,就是0.9升被倒出,剩下9-0.9=8.1升酒精,加水后浓度为81%;
第三次后:倒出的1升含有81%的酒精,就是0.81升被倒出,剩下8.1-0.81=7.29升,加水后浓度为72.9%.
另一种算法是100%X0.9^3=72.9%.
so the concentration of alcohol is 72.7%.
the concentration of alcohol in the container now:72.9%
容器里有十公升的酒精。倒出一公升后,加满水,然后重复两次。现在,容器里的酒精浓度是多少?
在容器中有10升酒精,倒出一升后,装装满水,然后再重复两次,现在容器中的酒精浓度多少?
there are 10 liters of alcohol in a container .after pouring out one liter ,fill it up with somewater;then repeat the experiment twice .what is the concentration of alcohol in the container now?
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