The length of the rectangle is 84 cm. How much will the area of the rectangle decrease if its width is reduced by 5 cm?
| May 18, 2021 | education
The area of a rectangle is found as the product of its sides. S = a * b. Substitute: S = 84 * b. If the width of the rectangle decreases by 5 cm, then: S = 84 * (b-5) Expand the brackets: S = 84 * b – 84 * 5; S = 84 * b – 420. Thus, if the width of the rectangle is reduced by 5 cm, then its area will decrease by 420 cm.
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