The length of a rectangle is 60cm and the perimeter 140cm, find the width
Let's use the formula for the perimeter of a rectangle:
Perimeter = 2(length + width)
We know that the length is 60cm and the perimeter is 140cm, so we can substitute those values into the formula:
140cm = 2(60cm + width)
Now we can simplify and solve for the width:
140cm = 120cm + 2width
20cm = 2width
width = 10cm
Therefore, the width of the rectangle is 10cm.