The length of the rectangle is 1 4/20 m and the width is 3/20 m less than the length. find the perimeter of the rectangle.

Length a = 1 4/20 m;
Width b -? 3/20 less than length;
Perimeter P -?;
Let’s apply the formula for the perimeter of a rectangle:
P = 2 (a + b);
We find the width knowing that it is less than the length by 3/20 m:
b = a – 3/20 = 1 4/20 – 3/20 = 1 + (4/20-3/20) = 1 + 1/20 = 1 1/20 (m);
Substitute numerical expressions into the formula for the perimeter of a rectangle:
P = 2 * (1 4/20 + 1 1/20) = 2 * 2 5/20 = 2 * 2 1/4 = 2 * 9/4 = 4.5 (m).
Answer: 4.5 m.