# How many times will the area of a rectangle with countries 20cm and 30cm decrease

March 26, 2021 | education

| **How many times will the area of a rectangle with countries 20cm and 30cm decrease if the smaller side is reduced by 5cm, and the larger one by 10cm.**

Let’s calculate the area of this rectangle, for this we multiply its width by its length:

20 * 30 = 600 cm2.

Let’s calculate what the new width of the rectangle will be if we reduce it by 5 cm:

20 – 5 = 15 cm.

Let’s calculate what the new length of the rectangle will be if we reduce it by 10 cm:

30 – 10 = 20 cm.

Let’s calculate the area of the new rectangle:

15 * 20 = 300 cm2.

Let’s find out how many times the area of the rectangle will decrease:

600: 300 = 2 times.

Answer: the area of the rectangle will decrease by 2 times.

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