Question

(PLEASE GIVE EXPLANATION) The dimensions of a rectangular prisms are given in the net shown.

What is the TOTAL SURFACE AREA of the rectangular prism in square inches?

Answer 1

142

Explanation:

You would find the sum of all the areas of all the rectangles.

30+42+70=142

Answer 2

142 in²

Explanation:

We want to find the area of all the rectangles and add them up.

For the 2 small rectangles on the side, the area is 15 in for each of them because 5x3. The 2 thinner rectangles each have an area of 21 in because 7x3. The 2 largest rectangles each have an area of 35 in because 5x7.

Now we can add it all up.

15+15+21+21+35+35=30+42+70=142