What is the area of 20m x 12m x14m?

To find the area, we need to clarify whether we are looking for the area of a surface or the volume of a three-dimensional shape. If we're calculating the surface area of a rectangular prism with dimensions 20m, 12m, and 14m, the surface area is calculated using the formula (2(lw + lh + wh)), resulting in (2(20 \times 12 + 20 \times 14 + 12 \times 14) = 2(240 + 280 + 168) = 2(688) = 1376 , \text{m}^2). If you meant volume, the volume would be (20 \times 12 \times 14 = 3360 , \text{m}^3).