A2. The rectangle $A B C D$ in the figure is divided into 7 congruent rectangles. What is the ratio $|B C|:|A B|$?
(A) $2: 3$
(B) $4: 5$
(C) $7: 12$
(D) $8: 15$
(E) The ratio depends on the size of the rectangles.

![](https://cdn.mathpix.com/cropped/2024_06_07_58dcb28c79ea4cc315e1g-14.jpg?height=226&width=332&top_left_y=1229&top_left_x=1573)
A2. Let the length of the longer side of 7 congruent rectangles be denoted by $a$, and the length of the shorter side by $b$. Then, $|A B|=|D C|=4 b=3 a$ or $b=\frac{3}{4} a$. The desired ratio is thus

$$
\frac{|B C|}{|A B|}=\frac{a+b}{4 b}=\frac{a+\frac{3}{4} a}{3 a}=\frac{\frac{7}{4}}{3}=\frac{7}{12}
$$