The height of the box is 100÷25=4 (dividing the volume by the area of the base gives us to the height). The sides of the base are 25​=5 inches long. The rectangular box has dimensions 5×5×4.The top and bottom have a surface area of 2(5×5)=50. The front and back have a surface area of 2(5×4)=40. The left and right have a surface area of 2(5×4)=40. The total surface area is 50+40+40=130.