What is the total surface area of the rectangular prism in square centimeters if the length is 12, the width is 6, and the height is 3

Total surface area of a rectangular prism can be calculated by adding the areas of all 6 faces.

The formula for total surface area of a rectangular prism is:
2lw + 2lh + 2wh

Given:
Length (l) = 12 cm
Width (w) = 6 cm
Height (h) = 3 cm

Calculating:

2lw = 2(12)(6) = 144 cm^2
2lh = 2(12)(3) = 72 cm^2
2wh = 2(6)(3) = 36 cm^2

Total surface area = 144 + 72 + 36 = 252 cm^2

Therefore, the total surface area of the rectangular prism is 252 square centimeters.