How many cubes need to be added to the figure below to make a cubc with a base area of 30 square units and a height of 4 units?

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To determine how many cubes need to be added to the existing figure to form a cuboid with a base area of 30 square units and a height of 4 units, follow these steps:

1. **Calculate the Total Number of Cubes in the Desired Cuboid:**
   - **Base Area:** 30 square units.
   - **Height:** 4 units.
   - **Total Cubes (Volume):** Base Area × Height = 30 × 4 = **120 cubes**.

2. **Determine the Number of Cubes to Add:**
   - If you know the number of cubes already present in the existing figure, subtract that number from the total desired number (120) to find out how many more cubes need to be added.
   - **Formula:** 
     $$
     \text{Cubes to Add} = 120 - \text{(Number of Existing Cubes)}
     $$

- **Example:**
     - **Existing Cubes:** Suppose there are currently 85 cubes.
     - **Cubes to Add:** 120 - 85 = **35 cubes**.

- **Note:** Since the exact number of existing cubes isn't provided, you'll need that information to calculate the specific number of cubes to add.

3. **Final Step:**
   - Add the calculated number of cubes to the existing figure to achieve the desired cuboid dimensions.

**Summary:** You need a total of **120 cubes** to form the desired cuboid. Subtract the number of cubes already present in your figure from 120 to determine how many more you need to add.
You need to add 35 cubes to the existing figure to make a cuboid with a base area of 30 square units and a height of 4 units.

How many cubes need to be added to the figure below to make a cubc with a base area of 30 square units and a height of 4 units?

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