Question
Find the area $ A $ of a cuboid if length $l = 15\, \text{cm}$, width $w = 12\, \text{cm}$ and height $h = 7\, \text{cm}$.
Answer
$738\, \text{cm}^2$
Explanation
To find area $ A $ use formula:
$$ A = 2 l h + 2 l w + 2 h w $$After substituting $l = 15\, \text{cm}$, $w = 12\, \text{cm}$ and $h = 7\, \text{cm}$ we have:
$$ A = 2 \cdot 15\, \text{cm} \cdot 12\, \text{cm} + 2 \cdot 15\, \text{cm} \cdot 7\, \text{cm} + 2 \cdot 12\, \text{cm} \cdot 7\, \text{cm} $$$$ A = 360\, \text{cm}^2 + 210\, \text{cm}^2 + 168\, \text{cm}^2 $$$$ A = 738\, \text{cm}^2 $$This page was created using
Cuboid Calculator