One kilometer is 1000 meters. One hour is 60 minutes, or six segments of 10 minutes each. If you can walk 1000 meters in 10 minutes, you can walk 6000 in an hour (that is REALLY fast, by the way)
We are asked to solve for the surface area of the described figure in the problem. We can conclude that the given figure is a rectangular prism since it was being mentioned in the problem that the height is laid flat. Therefore, the formula for the surface area is SA = PH + 2B where "P" stands for the perimeter of the rectangle and "B" stands for the area of the rectangle while "H" is for the height. Solving for P, we have it: P = width + length + width + length P = 10 + 5 + 10 + 5 P = 30 inches Solving for B, we have it: B = length * width B = 10 * 5 B = 50 inches squared Solving for the surface area, we have it: SA = PH + 2B SA = 30*7 + (2*50) SA = 310 inches squared