Question

.Which cube is a unit cube?

Answer 1

Answer:

Part 1 : Option d is correct.

Part 2 : Option d is correct.

Part 3 : 18 cubic units.

Step-by-step explanation:

Part 1 :  

Option d is correct.

A cube that has 1-yard length, 1-yard width, and 1-yard height is a unit cube as its volume is unity.

Part 2 :

Option d is correct.

If Eric wants to know how much sand is in his little brother's sandbox then he would require determining the volume of the sandbox.

Part 3 :

The front surface of the given figure has 9 total unit cube surfaces.

Now, each unit cube surface has area 1 square unit.

So, the front surface of the given figure has area 9 square units.

Now, the given figure has a thickness of two unit cube having total thickness = (1 + 1) = 2 units.

Therefore, the volume of the solid figure is = (Surface area × Thickness) = (9 × 2) = 18 cubic units. (Answer)