[ Answer ]

[ Explanation ]
= 6
Multiply Both Sides By 19
= 6 · 19
Simplify:
X = 114
Check Your Work:

Simplify:
= 6
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X=9.3 is the answer to the question
Answer:
Step-by-step explanation:
Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.