Question
Find the area $ A $ of a cuboid if length $l = 2\, \text{cm}$, width $w = 7\, \text{cm}$ and height $h = 2\, \text{cm}$.
Answer
$64\, \text{cm}^2$
Explanation
To find area $ A $ use formula:
$$ A = 2 l h + 2 l w + 2 h w $$After substituting $l = 2\, \text{cm}$, $w = 7\, \text{cm}$ and $h = 2\, \text{cm}$ we have:
$$ A = 2 \cdot 2\, \text{cm} \cdot 7\, \text{cm} + 2 \cdot 2\, \text{cm} \cdot 2\, \text{cm} + 2 \cdot 7\, \text{cm} \cdot 2\, \text{cm} $$$$ A = 28\, \text{cm}^2 + 8\, \text{cm}^2 + 28\, \text{cm}^2 $$$$ A = 64\, \text{cm}^2 $$This page was created using
Cuboid Calculator