Find the lateral surface area.
12 cm
30 cm
9 cm

  1476 cm²

Step-by-step explanation:

I like to use the formula ...

  SA = 2(LW +H(L +W))

  = 2((12 cm)(9 cm) + (30 cm)(12 cm +9 cm))

  = 2(108 cm² +(30 cm)(21 cm))

  = 2(108 cm² +630 cm²) = 2(738 cm²)

  total surface area = 1476 cm²

"Lateral surface area" usually refers to the area that is not part of the base(s). For a rectangular prism, it would be the product of the height and the perimeter of the base. You have not designated a base, so we cannot tell if you really want just the lateral surface area or the whole surface area. The above computation figures the whole surface area.

the answer to this question is 3/19

step-by-step explanation: