Question

这个正方形区域有多少比例被涂色？条纹宽度相等，图按比例绘制。

What fraction of this square region is shaded? Stripes are equal in width, and the figure is drawn to scale.

$\dfrac{5}{12}$

$\dfrac{1}{2}$

$\dfrac{7}{12}$

$\dfrac{2}{3}$

$\dfrac{5}{6}$

可以把大正方形分成 $6^2 = 36$ 个小正方形。涂色小正方形数为 $3 + 7 + 11 = 21.$

涂色比例为 $\dfrac{21}{36} = \dfrac{7}{12}.$

所以正确答案是 C。

We can split the square into $6^2 = 36$ unit squares. The number of shaded small squares is $3 + 7 + 11 = 21.$

The fraction of the square that is shaded is $\dfrac{21}{36} = \dfrac{7}{12}.$

Thus, C is the correct answer.