Question

Choose the group of one-inch cubes that forms a rectangular prism that has the given dimensions. Then find the surface area of the prism. 3×4×1

Answer 1

The surface area of the rectangular prism is 38 square units

The dimensions of the rectangular prism is given as:

$Length = 3$

$Width = 4$

$Height = 1$

The surface area of the rectangular is then calculated using the following surface area formula

$Area = 2 \times (Length \times Width + Length \times Height+ Width \times Height)$

Substitute the known values of Length, Width and Height

$Area = 2 \times (3 \times 4 + 3\times 1+ 4\times 1)$

Evaluate all products

$Area = 2 \times (12 + 3+ 4)$

Evaluate all sums

$Area = 2 \times (19)$

Remove bracket

$Area = 2 \times 19$

$Area = 38$

Hence, the surface area of the rectangular prism is 38 square units

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