The question is at the top but can the explanation be different then the one given below

Week 2 Discussion Board At Explain what is wrong with the following statement: A cylindrical tank is 10 meters deep. It takes twice as much work to pump all the oil out through the top of the tank when the tank is full as when the tank is half full. Remember to formally answer the question by Wednesday night 11:59 PM ET and respond to at least 2 of your classmates by Sunday night 11:59 PM ET. Search entries or author Unread IT Subscribe Reply Monica Vargas . . . 11:53am The weight of the oil residing on the upper half of the tank is the same as the oil residing on the bottom half of the tank. But the oil which is residing on the lower half must be pulled up more. Thus, as work is proportional to the distance by which the object is to be lifted. The work needed to pump the whole tank would be more than twice of the work needed to pump a half-full tank. Reply