Question 6! How do we find surface area?? Explain in details! 30 points plus brainliest

a) 476.16

b) 310.93

c) 542.36

Step-by-step explanation:

Surface area is sum of areas of all faces

a) 3 rectangles and 2 triangles

(9.2×16) + (9.2 × 12.8) + (9.6 × 9.2) + (0.5 × 12.8 × 9.6) + (0.5 × 12.8 × 9.6) = 476.16

b) 2 trapeziums and 4 rectangles

2(0.5×(12.5+9.2)×6) + 2(5.3×6.2) + (9.2×5.3) + (12.5×5.3) = 310.93

c) 2 trapeziums and 4 rectangles

2(0.5×(9+4)×15.2) + (4×7.8) + (9×7.8) + (15.2×7.8) + (16×7.8) = 542.36