Find the lateral area and the surface area of the box to the nearest whole number

Question

11 cm
1.57 cm
9 cm

Answer 1

Lateral area = perimeter of base x height
= (2 x 11 + 2 x 9) x 1.57
= 56.86 cm²
≈ 57 cm²

Surface area = 2 x area of base + lateral area
= 2 x 11 x 9 + 56.86
= 218.86 cm²
≈ 219 cm²

Therefore, the lateral area is 57 cm² and the surface area is 219 cm² (to the nearest whole number).