Question 5. Rob the Builder has a brick whose shortest side is 4 cm. He uses several such bricks to build the cube shown. What are the dimensions, in cm, of his brick? We take a closer look at the cube. And we know that the shortest side of the brick is 4. We can mark it on this side. Now, to count the total side length of this cube, we just add 4 for each of the bricks. And we total them together, getting 24. Now it is important to realize that we have built a cube. So with this, we can take a closer look at the side where there are only 2 bricks. And since we know that this is a cube, each of the edges equals 24. To get the length of this brick, we divide by 2 and get 12. And then, to get the final edge of our brick, we take the last edge of the cube and divide it by 3. 24 divided by 3 gives us 8. With this, we get our answer, which will be C, 4 by 8 by 12.

brick dimensions

cube construction

shortest side

Rob the Builder

4 by 8 by 12