
integrate to get
![[ln|t|]^{3x}_x=ln|3x|-ln|x|=ln| \frac{3x}{x}| =ln |3|=ln(3)](https://tex.z-dn.net/?f=%5Bln%7Ct%7C%5D%5E%7B3x%7D_x%3Dln%7C3x%7C-ln%7Cx%7C%3Dln%7C%20%5Cfrac%7B3x%7D%7Bx%7D%7C%20%3Dln%20%7C3%7C%3Dln%283%29)
this only is true when x>0
when x turns negative, we get -ln(3) because of math
If you have to find Lateral Superficial Area just do P (perimeter of base) * h
So (8+19+10+7) * 8 = 44*8 = 352 cm^2
If you have to find Total Superficial Area the formule is LA + 2[(B+b)*h/2]
TA = 352 + 2[(19*8)/2] = 352+2(76) = 352+152 = 504 cm^2