Question

what is the surface area of this rectangular prism?
sa = ft²

Explanation:

Step1: Recall the surface area formula

The formula for the surface area \(SA\) of a rectangular prism is \(SA = 2(lw+lh + wh)\), where \(l\) is length, \(w\) is width, and \(h\) is height. Here, \(l = 60\) ft, \(w=40\) ft, \(h = 30\) ft.

Step2: Calculate \(lw\), \(lh\), and \(wh\)

• \(lw=60\times40 = 2400\)
• \(lh=60\times30=1800\)
• \(wh=40\times30 = 1200\)

Step3: Sum \(lw\), \(lh\), and \(wh\)

\(lw+lh+wh=2400 + 1800+1200=5400\)

Step4: Multiply by 2

\(SA=2\times5400\)

Answer:

\(10800\)