# The perimeter of the rectangle is 9dm2cm. The length of one side is 3dm5cm. Find the length of the second side.

August 18, 2021 | education

| We translate these measurements into centimeters, 1 dm = 10 cm, 9 dm 2 cm = 90 cm + 2 cm = 92 cm, 3 dm 5 cm = 30 cm + 5 cm = 35 cm.

The perimeter of the rectangle is found by the formula P = 2 (a + b).

Substitute the known data into the formula, and find the length of the second side of the rectangle.

2 (35 + b) = 92;

35 + b = 92: 2;

35 + b = 46;

b = 46-35;

b = 11.

The length of the second side of the rectangle is 11 cm or 1 dm 1 cm.

Answer: 1 dm 1 cm.

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