Answer:
1. 258 square meters
2. 180 square meters
3. 286 square feet
Explanation:
1. Find the surface area of each side:
9 * 5 + 5 * 6 + 9 * 5 + 6 * 5 + 9 * 6 + 9 * 6
45 + 30 + 45 + 30 + 54 + 54
75 + 75 + 108
150 + 108
258
2. Base: 5 * 5 = 25
Top: 5 * 5 = 25
Sides: each 5 * 6.5 = 32.5
Altogether: 32.5 * 4 = 130
130 + 25 + 25 = 180
3. Base and top: both 8 * 10 = 80, together 80 * 2 = 160
Front and back sides: both 8 * 3.5 = 28, together 28 * 2 = 56
Left and right sides: both 10 * 3.5 = 35, together 35 * 2 = 70
Altogether: 160 + 56 + 70 = 286 sq feet