Answer:
SA = 470 m²
volume = 494 m³
Explanation:
Individual areas
Back = 4 x 19 = 76 m²
Top = 5 x 19 = 95 m²
sloped side = 5 x 19 = 95 m²
base = 8 x 19 = 152 m²
end = (4 x 5) + 1/2(3 x 4) = 26 m²
Total SA = 76 + 95 + 95 + 152 + (2 x 26) = 470 m²
Volume
volume = (4 x 5 x 19) + 1/2(3 x 4 x 19) = 494 m³