(1)

Step 1:

The length of the rectangular crate is $\"\"$ .

The width of the rectangular crate is $\"\"$ .

$\"\"$ .

$\"\"$

$\"\"$ .

The height of the rectangular crate is $\"\"$ .

$\"\"$

Step 2:

The surface area of the rectangular crate is $\"\"$ .

Substitute $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$

The area of the rectangular crate is $\"\"$ .

Solution :

The area of the rectangular crate is $\"\"$ .