I don't have a pencil or paper with me so I can't find the exact answer but I can guide you through the problem. First you want to subtract 7.05 from 40.75. This should give you the remaining amount of room on the platform. We will call that number "x". Since the bench is in the center, the amount of one edge of the bench to the corresponding edge on the platform should be the same on the opposite side. Therefore, divide the "x" by 2 to get your final answer. Feel free to comment if you don't get it.
