Respuesta :

wegnerkolmp2741o

Answer:

29622 m^2

Step-by-step explanation:

SA = 2 ( lw+ wh+ lh)  where l = length  w = width  h = height

SA = 2 ( 81*75+ 75* 56+ 81*56)

     = 2 (6075+4200+4536)

      = 2(14811)

      29622
29622m^2 if you multiply all of the sides by each other and add them (a•b, a•c c•b)2