The base and sides of a container is made of wood panels. The container does not have a lid. The base and sides are rectangular. The width of the container is x cm. The length is double the width. The volume of the container is 100 cm3. Determine the minimum surface area that this container will have.

106.71 cm²

Step-by-step explanation:

Let 'h' be the height of the container. If the width is x cm and the length is 2x cm, then the volume and surface area are given by:

Rewriting the area function as a function of 'x':

The value of 'x' for which the derivate of the area function is zero, is the one that yields the minimum surface area:

Therefore, the minimum area is:

The container will have a minimum surface area of 106.71 cm²

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°