The length of the rectangle is one whole 4/20 meters and the width is 3/20 meters less than the length.

The length of the rectangle is one whole 4/20 meters and the width is 3/20 meters less than the length. find the perimeter of the rectangle.

The task:
length of rectangle a – 1 4/20 meters,
the width of the rectangle b -?, 3/20 meters less than the length,
the perimeter of the rectangle P -? meters.
Solution:
1) calculate the width of the rectangle b:
b = a – 3/20 = 1 4/20 – 3/20 = 24/20 – 3/20 = 21/20 meters;
2) define the perimeter of the rectangle:
P = (a + b) 2 = (1 4/20 + 21/20) 2 = (24/20 + 21/20) 2 = (45/20) 2 = 90/20 = 9/2 = 4 1/2 meters.
Answer: the perimeter of the rectangle is P = 4 whole 1/2 meters.