Question

单词 HELP 用宽 $1$ 单位的笔画在一个 $5$ 乘 $15$ 的长方形标牌上画成阴影区域。每个字母宽 $3$ 单位，字母之间间隔 $1$ 单位，如图所示。标牌未涂色部分的面积是多少平方单位？

The word "HELP" in block letters is painted as a shaded region with strokes $1$ unit wide on a $5$ by $15$ rectangular sign. Each letter is $3$ units wide with a $1$ -unit gap between letters, as shown. The area of the unshaded portion of the sign, in square units, is

$30$

$32$

$34$

$36$

$38$

答案：D

知识点：面积分割

难度评级：960

解答：

整个标牌面积为 $5 \times 15 = 75$ 平方单位。数涂色单位方格可得 $H = 11$ 、 $E = 11$ 、 $L = 7$ 、 $P = 10$ ，涂色总面积为 $11 + 11 + 7 + 10 = 39$ 。

未涂色面积是 $75 - 39 = 36$ 。

所以正确答案是 D。

The full sign has area $5 \times 15 = 75$ square units. Counting the shaded unit squares in each letter gives $H = 11,$ $E = 11,$ $L = 7,$ and $P = 10,$ for a shaded total of $11 + 11 + 7 + 10 = 39.$

The unshaded area is $75 - 39 = 36.$

Thus, the correct answer is D .

1993 AMC 8 第 13 题

答案：D

难度评级：960

解答：

其他年份的第 13 题