At a construction site, 20,000 pounds of gravel are needed to create a driveway with an area of 400 ft2. What area of driveway can be added with another 125 pounds of gravel?
25.5 ft2
312 ft2
160 ft2
2.5 ft2
5 ft2
using the same ratio,
x/125 = 400/20000
x = 2.5
To solve this problem, we need to first find the amount of gravel required per square foot of the driveway.
Given that 20,000 pounds of gravel are needed for a driveway area of 400 ft², we can find the gravel required per square foot by dividing the total weight of gravel by the area of the driveway:
Gravel required per square foot = Total weight of gravel / Area of driveway
Gravel required per square foot = 20,000 pounds / 400 ft²
Gravel required per square foot = 50 pounds/ft²
Now, let's calculate the area of driveway that can be added with another 125 pounds of gravel. To do this, we will divide the given weight of gravel (125 pounds) by the gravel required per square foot:
Area of driveway that can be added = Weight of gravel / Gravel required per square foot
Area of driveway that can be added = 125 pounds / 50 pounds/ft²
Area of driveway that can be added = 2.5 ft²
Therefore, the area of driveway that can be added with another 125 pounds of gravel is 2.5 ft².