Respuesta :

blitzangel
so you multiple length times the width (lw) then multiple the height times the width (hw) and then multiply the length times the height (lh)
add all of those numbers together.
times that answer by 2.

SA=2×((30×20)+(15×20)+(30×15))
SA=2×(600+300+450)
SA=2×1350
SA=2700
ummeammara1999
SA = 2 ( 20*30 + 20*15 + 30*15)
= 2 ( 600 + 300 + 450)
= 2 (1350)
= 2700

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