To find the area of the sandbox, we will use the formula \( A = 12bh \).
Next, we will substitute the values for \( b \) (the width) and \( h \) (the height). Let's assume \( b = 2.4 \) m and \( h = 3.5 \) m. So we substitute:
\[ A = 12(2.4)(3.5) \]
Now, we can simplify this expression. First, multiply \( 2.4 \) and \( 3.5 \):
\[ 2.4 \times 3.5 = 8.4 \]
Now, multiply by \( 12 \):
\[ A = 12 \times 8.4 = 100.8 \]
So the area of the sandbox is:
The area of the sandbox is 100.8 m².