Question

This composite figure is made of two identical pyramids attached at their bases. Each pyramid has a height of 2 units.

2 identical pyramids with rectangular bases are connected at their base. The height of the pyramid is 2. The lengths of the sides of the rectangle are 5 and 0.25 units.

Which expression represents the volume, in cubic units, of the composite figure?

One-half (One-third (5) (0.25) (2) )
One-half (One-third (5) (0.25) (4) )
2(One-third (5) (0.25) (2) )
2(One-third (5) (0.25) (4) )

Answer 1

Volume of one pyramid = (1/3)(base area)(height) = (1/3)(5)(0.25)(2). For two identical pyramids multiply by 2.

So the correct expression is: 2(One-third (5) (0.25) (2) ), which equals 5/3 cubic units.