STEP 1: find side $ a $
To find side $ a $ use formula:
$$ P = 6 \cdot a $$After substituting $ P = 240 $ we have:
$$ 240 = 6 \cdot a $$ $$ a = \dfrac{ 240 }{ 6 } $$ $$ a = 40 $$STEP 2: find area $ A $
To find area $ A $ use formula:
$$ A = \dfrac{ 3 \sqrt{ 3 } \cdot a^2 }{ 2 } $$After substituting $ a = 40 $ we have:
$$ A = \dfrac{ 3 \sqrt{ 3 } \cdot 40^2 }{ 2 } $$ $$ A = \dfrac{ 3 \sqrt{ 3 } \cdot 1600 }{ 2 }$$ $$ A = \dfrac{ 4800 \sqrt{ 3 } }{ 2 }$$ $$ A = 2400 \sqrt{ 3 } $$