Fran needs to paint her bedroom walls pink. The paint is made from 1 part red
paint, 3 parts white. Her room is rectangular, 4m by 3m and walls are 2m high. 1
litre of paint covers 7m2
. How much white paint is used?
2(4*2 + 3*2) m^2 * 1L/7m^2 = 4 L
3/4 of that is white, so 3L white and 1L red
thanks!
To find out how much white paint is used, we need to calculate the area of the walls that need to be painted and then find out how much white paint is required to cover that area.
First, let's calculate the total area of the walls. The room is rectangular, so we can use the formula: Area = 2 * (length + width) * height. Plugging in the values, we get:
Area = 2 * (4m + 3m) * 2m
= 2 * 7m * 2m
= 28m²
Now, let's find out how many liters of paint are required to cover this area. We know that 1 liter of paint covers 7m². So, we can divide the total area by 7 to get the amount of paint required:
Paint required = Area / Coverage per liter
= 28m² / 7m²
= 4 liters
Since the paint is made from 1 part red paint to 3 parts white paint, we need to determine the ratio of white paint to total paint. The total paint required is 4 liters, so the amount of white paint would be 3 parts out of 4 parts.
Finally, to find out how much white paint is used, we can calculate:
White paint used = (Amount of white paint / Total parts) * Total paint required
= (3/4) * 4 liters
= 3 liters
Therefore, Fran needs 3 liters of white paint to complete the job.