To calculate the area of the sandbox, we can use the formula for the area of a rectangle, which is \( A = b \times h \). However, you've mentioned a formula as \( A = 12bh \), which seems like there's a coefficient of 12 for the area.
Assuming it should be \( A = bh \), where:
- \( b \) is the base (width)
- \( h \) is the height (length)
Given:
- Width \( b = 2.4 \) m
- Length \( h = 3.5 \) m
Now, substitute the values into the formula:
\( A = b \times h \)
\( A = (2.4) \times (3.5) \)
Now, calculate the area:
\( A = 2.4 \times 3.5 = 8.4 , \text{m}^2 \)
So, the area of the sandbox is \( 8.4 , \text{m}^2 \).