The perimeter of the rectangle is 80 cm. What are the length and width of the rectangle if the width a is 4 times less than the length?
Let’s solve this problem using the equation.
Let the width of the rectangle be x centimeters and the length 4 * x centimeters. We know that the perimeter of this rectangle is 80 centimeters. Let’s make the equation:
4 * x + x = 80;
x * (4 + 1) = 80;
x * 5 = 80 (in order to find an unknown factor, you need to divide the product by a known factor);
x = 80: 5;
x = 16 centimeters – the width of the rectangle;
16 * 4 = 64 centimeters – the length of the rectangle.
Answer: 16 centimeters; 64 centimeters.
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