1) Base = 0.5(apothem)(perimeter) = (0.5)(4.8 yd)(5*7 yd) = 84 sq. yd. Since height = 4 yd, Volume = bh = 336 cubic yards
2) Lateral area = (3)(6) + (4)(6) + 5(6) = 72 in^2Surface area includes the top and bottom surfaces, which are right triangles with area (0.5)(3 in)(4 in) = 6 in^2, and since there are 2 of them, their area is 12 in^2, giving a total surface area of 72 + 12 = 84 in^2.
3) Base is a rectangle, so area = (11 m)(5 m) = 55 m^2. Height = 9 m, so volume = bh = 495 m^3.
