Current location - Training Enrollment Network - Mathematics courses - Ask for help with a math problem and say that there is 1000 Jin of fruit with a water content of 90%. After a week, the water content changed from 90% to 80%. Ask how many Jin of fruit there are now.
Ask for help with a math problem and say that there is 1000 Jin of fruit with a water content of 90%. After a week, the water content changed from 90% to 80%. Ask how many Jin of fruit there are now.
It turned out to be 1000 kg fruit, with a water content of 90%, corresponding to 900 kg, and the remaining fruit quality 10%, corresponding to10% *1000 =1000 kg.
Now it's x Jin of fruit, with water content of 80%, corresponding to 0.8*x Jin, and the remaining fruit quality of 20%, corresponding to 20%*x= 100 Jin.
So x= 100÷20%=500 kg, hehe, it's so simple and unreasonable. It takes effort.