Smart Formula Math  Rectangular box (Beams) is Cube and the beam is not really much different. If the cube all the sides the same length of the beam are not all the same length. 

Volume = l x w x h [in fact equal to the cube, it's just that the cube has all the ribs of the same length].
Beam Surface Area = 2 . {[l . w]+[l . h]+[w . h)]
Roving Beams = 4 . [l + w + h]
The roots of the diagonal spaces = [ l squared + w squared + h squared ]


Note :
length = l , width = w , height = h

Example

Question :
Find the Volume and  Surface Area beam below if length =4,width =3, high= 5

Answer :
Volume Of beams = l x w x h = 4 x 3 x 5 = 60

Beam Surface Area = 2 x {(l x w) + (l x h) + (w x h)}
2 x {(4 x 3) + (4 x 5) + (3 x 5)} = 2 x ( 12 + 20 + 15 ) = 94

That is example find the volume and area of beams which was submitted by the smart math basic formula.