3 meters of square bathroom floor tiles are 30CM long, the unit price is 5 6 yuan, and the other

A three-meter square is 9 square meters, which is 90,000 square centimeters and 30 centimeters of floor tiles.

It's 900 square centimeters, and you need 100 tiles that cost 60 centimeters.

The area is 3600 square centimeters, and it costs 90000 3600 = 25 yuan.

So it's cheaper to use large bricks.

According to the area = side length * side length, one large brick = four small bricks, the price of four small bricks is much more expensive, so use the big one.

Solution: The area of the bathroom is: 3*3=9

If you use small bricks: 9 yuan per square meter.

The large brick is: 06 * square meters 9 yuan.

Now see for yourself?

The first one costs 100 yuan and costs 100*

The second one costs 25 yuan and costs 25*

The second way to save money is 560-320=240