Question

Сколько рулонов обоев нужно купить, чтобы оклеить стены комнаты, если: размер рулона обоев: длина 10 м, ширина 50см . размеры стен:а) две стены одинаковые: длина 5м, ширина ( высота) 2м 60 см. б) площадь части третей стены, которая будет оклеиваться обоями 42 000 см2, а четвёртой 48 000 см2.Испульзуя данные задачи, вычисли, сколько нужно заплатить за покупку этих обоев, если цена одного рулона 800 рублей.

Answer 1

1)10х5=50(м2)=5000(см2)-площадь которую можно оклеит 1 рулоном обоев
2)(500+260)х2=260000(см2)-площадь двух стен
3)260000+42000+48000=350000(см2)-площадь стен которую нужно оклеить
4)350000:5000=70(рул.)-столько рулонов обоев понадобится
5)800х70=56000(руб.)-столько нужно заплатить за покупку этих обоев

Answer 2

Calculation of the Number of Wallpaper Rolls Needed

To calculate the number of wallpaper rolls needed to cover the walls of the room, we need to determine the total area of the walls and divide it by the area covered by one roll of wallpaper.

Let's calculate the number of rolls needed for each scenario:

# Scenario A: Two Identical Walls

- Length of each wall: 5m - Width (height) of each wall: 2m 60cm

To calculate the area of each wall, we multiply the length by the width: - Area of each wall = 5m * 2.6m = 13 square meters

Since there are two identical walls, the total area of the walls is: - Total area = 2 * 13 square meters = 26 square meters

# Scenario B: Part of the Third Wall and the Fourth Wall

- Area of the part of the third wall to be covered: 42,000 cm² - Area of the fourth wall to be covered: 48,000 cm²

To convert the areas to square meters, we divide by 10,000: - Area of the part of the third wall = 42,000 cm² / 10,000 = 4.2 square meters - Area of the fourth wall = 48,000 cm² / 10,000 = 4.8 square meters

# Total Area of Walls to be Covered

To calculate the total area of the walls to be covered, we sum up the areas from both scenarios: - Total area = 26 square meters + 4.2 square meters + 4.8 square meters = 35 square meters

# Area Covered by One Roll of Wallpaper

- Length of one roll of wallpaper: 10m - Width of one roll of wallpaper: 50cm = 0.5m

To calculate the area covered by one roll of wallpaper, we multiply the length by the width: - Area covered by one roll = 10m * 0.5m = 5 square meters

# Calculation of the Number of Rolls Needed

To calculate the number of rolls needed, we divide the total area of the walls by the area covered by one roll: - Number of rolls needed = Total area / Area covered by one roll - Number of rolls needed = 35 square meters / 5 square meters = 7 rolls

Therefore, you would need to buy 7 rolls of wallpaper to cover the walls of the room.

Calculation of the Total Cost of Wallpaper

To calculate the total cost of the wallpaper, we multiply the number of rolls needed by the price of one roll: - Price of one roll = 800 rubles - Number of rolls needed = 7 rolls

To calculate the total cost, we multiply the number of rolls by the price per roll: - Total cost = Number of rolls needed * Price of one roll - Total cost = 7 rolls * 800 rubles = 5600 rubles

Therefore, you would need to pay 5600 rubles for the purchase of these wallpapers.

Please note that the calculations provided are based on the given information and assumptions.