Given that a bag can hold 2 pounds of dog food.
We need a new bag which holds 40 pounds of dog food.
![(40)/(2)=20](https://img.qammunity.org/2023/formulas/mathematics/college/t1l7s4rc471cr4ouuv8sayy23m7nlk0jd9.png)
The scale factor of the volume of the bags of dog food is 20 which means the scale factor of the dimension of the two bags is 20.
Therefore the scale factor of the surface area of the two bags is 20.