The sides of the rectangle are 7 cm and 13 cm by what percentage the perimeter

The sides of the rectangle are 7 cm and 13 cm by what percentage the perimeter of the rectangle will increase if the length is increased by 7 cm and the width by 3 cm.

Let’s define the perimeter of the original rectangle. Р1 = 2 * (7 + 13) = 40 cm.

Since the two sides of the rectangle have increased by (7 + 3) cm, the new perimeter will increase by 2 * 10 = 20 cm.

P2 = P1 + 20 = 60 cm.

Let’s make a proportion and solve it.

40 cm – 100%.

60 cm – X%.

X = 100 * 60/40 = 150%.

Then 150 – 100 = 50%.

Answer: The perimeter will increase by 50%.