Find the surface area of each rectangula 1. $\ell=6$ in. $w=1$ in,$h=4$ in

Step 1 ：Given a rectangular prism with length \(l = 6\) in, width \(w = 1\) in, and height \(h = 4\) in.

Step 2 ：The surface area of a rectangular prism is given by the formula \(2lw + 2lh + 2wh\).

Step 3 ：Substitute the given values into the formula: \(2(6)(1) + 2(6)(4) + 2(1)(4)\).

Step 4 ：Calculate the expression to get the surface area: \(68\) square inches.

Step 5 ：Final Answer: The surface area of the rectangular prism is \(\boxed{68}\) square inches.