The lengths of the sides of the rectangle are proportional to the numbers 3.5 and 8. Find the sum of the smaller

The lengths of the sides of the rectangle are proportional to the numbers 3.5 and 8. Find the sum of the smaller and larger sides of the triangle if its pyrometer is 80 cm.

Let’s find how long all sides have in conventional parts, if the ratio is known 3: 5: 8.

1) 3 + 5 + 8 = 16 (h.)

Because this amount represents the perimeter and in absolute terms is equal to 80 cm, which means that each part accounts for:

2) 80/16 = 5 (cm).

Find the smaller side that matches the 3 parts:

3) 5 * 3 = 15 (cm).

The large side has a length that corresponds to 8 parts:

4) 5 * 8 = 40 (cm).

Accordingly, the sum of the lengths of these two sides will be equal to:

5) 15 + 40 = 55 (cm).

Answer: the sum of the two sides is 55 cm.