Question

one kilogram is about 2.205 pounds.when a 55 gallon aquarium is fiiled it weights 625 lb to the nearest tenth how many kilograms is this?

Answer 1

625x2.205

Answer 2

That's not quite right.

We know that a kilogram is about 2.205 pounds. Let's simplify this question and imagine that the tank in question is 1 kilogram.

If the tank is 1 kilogram, then it's 2.205 pounds. We need to calculate how many kilograms that is. 2.205 * 2.205 doesn't give us the correct answer (i.e, 1). What does give us the correct answer is division. 2.205 / 2.205 = 1, and we started with a 1 kilogram tank.

From this, we can extend this to our original problem. In order to turn pounds into kilograms, we divide by 2.205.

625 / 2.205 = 283.5. I've given the answer to the nearest tenth, because the tank's weight was also specified to the nearest tenth. Always be sure to ask yourself how much precision is required with a question like this; it'll generally be hinted at in the question.