1. A square sheet of iron with a circumference of 1.2 meters. After cutting it into four equal largest circles, how much scrap is left? 2. The land area on the earth is about 3.554 billion square kilometers, and the ocean area is about 300 million square kilometers. Write the ratio of land area and ocean area, and simplify it 3. A kind of liquid medicine is made of powder and water in the ratio of 1:100. If you want to prepare 404kg of this liquid medicine, how many kg of powder and water are needed? The netizen that can please come out formula, the netizen that lists solution idea gets reward cent chance to be higher We have to work out the formula!

1. A square sheet of iron with a circumference of 1.2 meters. After cutting it into four equal largest circles, how much scrap is left? 2. The land area on the earth is about 3.554 billion square kilometers, and the ocean area is about 300 million square kilometers. Write the ratio of land area and ocean area, and simplify it 3. A kind of liquid medicine is made of powder and water in the ratio of 1:100. If you want to prepare 404kg of this liquid medicine, how many kg of powder and water are needed? The netizen that can please come out formula, the netizen that lists solution idea gets reward cent chance to be higher We have to work out the formula!

1.44-0.36vπ
35/162
Medicine 4 water 400