Question

Francesca 用 $100$ 克柠檬汁、 $100$ 克糖和 $400$ 克水制作柠檬水。每 $100$ 克柠檬汁含 $25$ 卡路里，每 $100$ 克糖含 $386$ 卡路里。水不含卡路里。她的 $200$ 克柠檬水含多少卡路里？

Francesca uses $100$ grams of lemon juice, $100$ grams of sugar, and $400$ grams of water to make lemonade. There are $25$ calories in $100$ grams of lemon juice and $386$ calories in $100$ grams of sugar. Water contains no calories. How many calories are in $200$ grams of her lemonade?

$129$

$137$

$174$

$223$

$411$

答案：B

知识点：比与比例速率

难度评级：1000

解答：

柠檬水总重 $100+100+400=600$ 克，含 $25+386=411$ 卡路里。

$200$ 克中有 $411\cdot\tfrac{200}{600}=\tfrac{411}{3}=137$ 卡路里。

所以正确答案是 B。

The lemonade totals $100+100+400=600$ grams containing $25+386=411$ calories.

In $200$ grams there are $411\cdot\tfrac{200}{600}=\tfrac{411}{3}=137$ calories.

Thus, the correct answer is B.

2006 AMC 10B 第 9 题

答案：B

难度评级：1000

解答：

其他年份的第 9 题