Final answer:
When the width of the rectangle is enlarged to 2 cm, it will be 4 cm tall.
Step-by-step explanation:
To find out how tall the rectangle will be when its width is 2 cm, we can use proportional reasoning. We know that the original rectangle has a height of 2 cm and a width of 1 cm. Since the width is being enlarged to 2 cm, we can set up a proportion: 1 cm / 2 cm = 2 cm / x cm, where x represents the new height. Solving this proportion, we find that x = 4 cm. Therefore, when the width is enlarged to 2 cm, the rectangle will be 4 cm tall.
Learn more about Proportional reasoning