20m square of wallpaper cost $36.
A)Calculate the cost of 55m square of the same wallpaper.
b)What area of this wallpaper can you buy for $75.60?
a ) ( 55 / 20 ) * $36 = $99
b) ( 75.6 / 36 ) * 20 = 42m^2
20 m^2 ---> $36
55 m^2 ---> $x
20/55 = 36/x
4/11 = 36/x
cross-multiply, 4x = 396
x = 99
so the 2nd part in the same way ....
let me know what you get
A. (36/20) * 55 = $99.
B. (36/20) * A = 75.60,
A = (20/36) * 75.60.
To calculate the cost of 55 square meters of the same wallpaper, we need to find the cost per square meter and then multiply it by 55.
Given that 20 square meters of the wallpaper costs $36, we first calculate the cost per square meter:
Cost per square meter = Total cost / Total area
Cost per square meter = $36 / 20m²
Cost per square meter = $1.80/m²
Now, we can calculate the cost of 55 square meters of the wallpaper by multiplying the cost per square meter by 55:
Cost of 55m² of wallpaper = Cost per square meter * 55m²
Cost of 55m² of wallpaper = $1.80/m² * 55m²
Cost of 55m² of wallpaper = $99
Therefore, the cost of 55 square meters of the same wallpaper is $99.
To determine the area of this wallpaper that you can buy for $75.60, we need to divide the total cost by the cost per square meter:
Area of wallpaper = Total cost / Cost per square meter
Area of wallpaper = $75.60 / $1.80/m²
Area of wallpaper = 42m²
Therefore, you can buy 42 square meters of this wallpaper for $75.60.