Question
Find the volume $ V $ of a pyramid if height $h = 20\, \text{cm}$ and base area $B = 225\, \text{cm}$.
Answer
$1500\, \text{cm}$
Explanation
STEP 1: find side $ a $
To find side $ a $ use formula:
After substituting $B = 225\, \text{cm}$ we have:
$$ B = a^2 $$ $$ a^2 = 225\, \text{cm} $$ $$ a = \sqrt{ 225\, \text{cm} } $$ $$ a = 15 $$STEP 2: find volume $ V $
To find volume $ V $ use formula:
$$ V = \dfrac{ a ^{ 2 } \cdot h }{ 3 } $$After substituting $a = 15\, \text{cm}^0$ and $h = 20\, \text{cm}$ we have:
$$ V = \dfrac{ 225 \cdot 20\, \text{cm} }{ 3 }$$$$ V = \dfrac{ 4500\, \text{cm} }{ 3 } $$$$ V = 1500\, \text{cm} $$This page was created using
Pyramid Calculator