In the sixth grade math problem of primary school, there is a kind of sugar water with a sugar content of 20% and 3200 grams, which is converted into sugar content of sugar water 10%. How many grams of water do I need?
Hello:
3200 grams of sugar water containing 20% sugar, sugar:
3200× 20% = 640 (g)
Sugar water made of 10% sugar * * * includes:
640 ÷ 10% = 6400 (g)
Need to add water:
6400-3200 = 3200 (gram)