Question

If the length I of a room is reduced by 10% and breadth b is increased by 10%, then find the positive change in its perimeter.

• A. $$\frac25 (l + b)$$
• B. $$\frac{(l+b)}{5}$$
• C. $$\frac{(l-b)}{5}$$
• D. $$\frac25 (l - b)$$

Answer 1

Answer:

$$\frac{(l-b)}{5}$$

$\frac{(l-b)}{5}$