Surface area of rectangular prism 3 inches height 9 inches length 5 inches width

Answer: The surface area (or SA) of the prism is 174 inches squared.

Step-by-step explanation: All you must do to find the surface area of a rectangular prism is follow the formula SA = 2 (wl+hl+hw)

SA = 2 (5x9 + 3x9 + 3x5)

SA = 2 (45 + 27 + 15)

SA = 2 (87) * a number next to another number in parenthesis means to multiply*

SA = 2 x 87

SA = 174 in. sq.

The surface area of rectangular prism = Surface area

Step-by-step explanation:

Formula:

The surface area of a rectangular prism with length 'l', breadth 'b' and height 'h' is given by,

Surface area = 2 (lb + bh + lh)

Find the surface area of rectangular prism

l = 9 inches, b = 5 inches and h = 3

Surface area = 2 (lb + bh + lh)

Surface area = 2 (9*5 + 5*3 + 9*3)

Surface area = 2 (45 + 15 + 27) = 2 * 87 = 174 square inches

Therefore the surface area of rectangular prism = Surface area