The width of a piece of wallpaper is 1 m and the area of this piece is 56,000 cm², which is the length of the piece.

1. We convert the units of measurement of area into square meters:

1 square centimeter = 0.0001 square meter;

56,000 cm² = 56,000 x 0.0001 = 5.6 m².

2. Determine the length of the piece:

5.6 / 1 = 5.6 meters.

1 meter = 100 centimeters;

5.6 meters = 5.6 x 100 = 560 centimeters – length of a piece of wallpaper;

1 meter = 100 centimeters – width.