An oil storage tank is 50 feet across and 40 feet high and filled with oil to a depth of 10 feet. How many cubic feet of oil is in the tank?

V = pi * r^2 * h

V = 3.14 * 25^2 * 10
V = ?

To find the volume of oil in the tank, you need to find the volume of a cylindrical shape.

First, determine the radius of the tank. The radius is half the diameter, which is given as 50 feet. So, the radius is 50/2 = 25 feet.

Next, calculate the volume of the cylindrical shape using the formula V = π * r^2 * h, where V is the volume, π is a mathematical constant approximately equal to 3.14, r is the radius, and h is the height.

Substituting the known values into the formula, the volume of the oil in the tank is:
V = π * 25^2 * 10 = 3.14 * 25 * 25 * 10 = 19,625 cubic feet.

So, the tank contains 19,625 cubic feet of oil.