The height, width and length of the steps are identical. Calculate the cubic feet of concrete needed to create the stairwell.A) 81 cubic feet B) 135 cubic feet C) 162 cubic feet D) 270 cubic feet

The answer is  C) 162!

Count the number of rectangular prisms needed to make the stairwell (6) and multiply it by the volume of each prism (1.5x3x6). 6 x 27 = 162 cubic feet