Answer:
50 cube feet of earth is removed.
Explanation:
Given : A mason is putting in the foundation for a wall his assistant digs a trench in roughly the shape of a rectangle or solid measuring 50 feet in length 12 inches deep along both sides and 12 inches wide at the top and bottom.
To find : How many cubic feet of earth did he removed?
Solution :
The roughly shape of foundation is rectangle or cuboid.
The length is 50 feet.
The Breadth is 12 inches
We know, 1 feet = 12 inches
or 1 inches =
feet
So, 12 inches =

The height is 12 inches = 1 feet.
Now, The volume of the rectangle is



Therefore, 50 cube feet of earth is removed.