Question

Can someone tell me the answer step by step about the surface area please I really need help

Answer 1

What you have to do is find the sume of all of the areas of the rectangles in this rectangular prism.

Lets find the front and back first.

9in * 14in = 126 in^2
9in * 14in = 126 in^2
                =  252 in^2

Now for the top and bottom.

3in * 14in = 42 in^2
3in * 14in = 42 in^2
                = 84 in^2

And now for the left and right
9in * 3in = 27 in^2
9in * 3in = 27 in^2
              = 54 in^2

Finally we can add them all together!
252 in^2 + 84 in^2 + 54 in^2= 390 in squared.