The face of a walll measures 30 yards by 24 yards. If the wall is to be completely covered with square bricks measuring 3 yards on each side, how many bricks will be needed to cover the wall?

Answer

To solve the problem of how many square bricks are needed to cover a wall measuring 30 yards by 24 yards, we can follow these steps:

### Step 1: Calculate the area of the wall
The area of a rectangle (the wall in this case) is calculated using the formula:
\[ \text{Area of the wall} = \text{Length} \times \text{Breadth} \]
Substituting the given dimensions:
\[ \text{Area of the wall} = 30 \, \text{yards} \times 24 \, \text{yards} = 720 \, \text{square yards} \]

### Step 2: Calculate the area of one brick
Since the bricks are square and each side measures 3 yards, the area of one brick is calculated as:
\[ \text{Area of one brick} = \text{Side} \times \text{Side} = 3 \, \text{yards} \times 3 \, \text{yards} = 9 \, \text{square yards} \]

### Step 3: Calculate the number of bricks needed
To find the total number of bricks required to cover the entire wall, we divide the area of the wall by the area of one brick:
\[ \text{Number of bricks} = \frac{\text{Area of the wall}}{\text{Area of one brick}} = \frac{720 \, \text{square yards}}{9 \, \text{square yards}} = 80 \]

### Conclusion
Thus, the total number of bricks needed to cover the wall is:
\[ \boxed{80} \]

---