A piece of rectangular plywood has a length of 4 times its width, the width of this piece is 5 dm2. Find the perimeter of the piece of plywood.
Determine the length of the piece of plywood.
5 * 4 = 20 dm.
The length of a piece of plywood is 20 dm.
We find the perimeter. From the rule, we know that the perimeter is the sum of the length and width multiplied by 2.
P = (20 + 5) * 2
P = 25 * 2
P = 50 dm.
Answer: The perimeter of a piece of plywood is 50 dm.
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