Question

A rectangle prism has a length of 7 cm, a width of 4 cm, and a height of 2 1/2 cm.

The prism is filled with cubes the have edge lengths of 1/2 cm .

How many cubes are needed to fill the rectangular prism?

Enter your answer in the box.

To fill the rectangular prism,_____ cubes are needed.​

Answer 1

The heartened are in cm so it's L x W x H which would be 7 x 4 x 2.5 = 70cm cubes.

But because our cubes are 1/2cm cubes, each 1cm cube holds 8 1/2 cm cubes. (2 x. 05 long by 2 x 0.5 wide by 2 x 0.5 high)

So we need to multiply our 70 cm cubes by 8.

70x 8 = 560 1/2 cm cubes.