The length of a rectangle is xcm and the width 7cm . find the length of area if the rectangle is 56cm

The area \( A \) of a rectangle is calculated using the formula:

\[
A = \text{length} \times \text{width}
\]

In this case, the length is \( x \) cm and the width is \( 7 \) cm. According to your question, the area is given as \( 56 \) cm². We can set up the equation:

\[
A = x \times 7 = 56
\]

To find the value of \( x \), we can rearrange the equation:

\[
x \times 7 = 56
\]

Now, divide both sides by \( 7 \):

\[
x = \frac{56}{7}
\]
\[
x = 8
\]

So, the length of the rectangle is \( 8 \) cm.