Question

Comparing areas?

Answer 1

The area decreases from `225cm^2` to `100cm^2`, which is a decrease of `125cm^2`

Explanation:

Initially, the sides of a square is 15cm long. The area initially (which you got) is `Area=L*W=15*15=225`

If all 4 sides are decreased by 5cm, it means that instead of all the sides being 15, it is now 10cm. (`15-5=10`) So the new area of the square is `Area=L*W=10*10=100`

To find the total decrease, we take the original area and subtract it by the new area. `225-100=125` So this is therefore a decrease of `125cm^2` from the original area.