Question

Надо окантовать квартирный плакат ,сторона которого 45см.Для окантовки заготовили полоску бумаги длиной в 2метра.Сколько см этой полоски останется после окантовки? 20 балов)

Answer 1

2 метра=200см
длина сторон плаката 45*4=180см
следовательно останется 200-180=20см

Answer 2

Calculation of Remaining Paper Strip Length

To calculate the length of the paper strip that will remain after edging the poster, we need to subtract the perimeter of the poster from the total length of the paper strip.

Given: - Length of one side of the poster: 45 cm - Length of the paper strip: 2 meters (200 cm)

To find the perimeter of the poster, we multiply the length of one side by 4 (since a rectangle has four sides of equal length): Perimeter of the poster = 45 cm * 4 = 180 cm

To find the length of the remaining paper strip, we subtract the perimeter of the poster from the total length of the paper strip: Remaining paper strip length = Total length of the paper strip - Perimeter of the poster Remaining paper strip length = 200 cm - 180 cm = 20 cm

Therefore, after edging the poster, there will be 20 cm of the paper strip remaining.