Width 38 cm.How much will the area of the rectangle decrease if its length is reduced by 5 cm.

1) Let’s take the length of the first rectangle as x;

2) The length of the second reduced rectangle will be x -5;

3) The area of the first rectangle will be S1 = 38 x;

4) The area of the second reduced rectangle S2 = 38 (x – 5);

5) The difference in areas will be 38 x – 38 (x – 5) = 38 x -38 x + 190 = 190 cm ^ 2;

Total: The area of the rectangle will decrease by 190 cm ^ 2.