Let 5x be the length of the smaller side of the rectangle and 7x be the length of the longer side of the rectangle.
We know that the perimeter of a rectangle is given by: 2(length + width)
So, we can write an equation as:
2(5x + 7x) = 144
Simplifying the equation, we get:
24x = 144
x = 6
Therefore, the length of the longer side (7x) is:
7x = 7(6) = 42 cm
Hence, the length of the longest side is 42 cm.
The sides of a rectangle are in the ratio of 5:7.
The perimeter is 144cm.
What is the length of the longest side?
1 answer