Answer:
380 m²
Explanation:
Total surface area = area of top + area of bottom (the part laid flat against the ground) + the rectangular side facing us + left slope + right slope + largest side (the one area obscured from sight).
area of top = 1/2 (15 + 5) 7 = 70.
area of bottom will be the same. ie 70.
rectangular = 5 X 6 = 30.
area of left slope = 10 X 6 = 60.
area of right slope also = 60.
area largest side = 6 X 15 = 90.
Total surface area = (70 + 70 + 30 + 60 + 60 + 90) = 380 m²