1. The income ratio of Zhang Jia and Li Jia this month is 8:5, and the expenditure ratio this month is 8:3. At the end of the month, Zhang Jia saved 240 yuan and Li Jia saved 510 yuan? 2. The ratio of tons of grain stored in warehouse A and warehouse B was 8:7, and the ratio of tons of grain transported out this month was 4:1. At the end of the month, there were 400 tons of grain in both warehouses. How many tons of grain was stored in warehouse a?

1. The income ratio of Zhang Jia and Li Jia this month is 8:5, and the expenditure ratio this month is 8:3. At the end of the month, Zhang Jia saved 240 yuan and Li Jia saved 510 yuan? 2. The ratio of tons of grain stored in warehouse A and warehouse B was 8:7, and the ratio of tons of grain transported out this month was 4:1. At the end of the month, there were 400 tons of grain in both warehouses. How many tons of grain was stored in warehouse a?

8 incomes - 8 expenditures = 240 yuan
1 income - 1 expenditure = 240 △ 8 = 30 yuan
5 incomes - 3 expenditures = 510 yuan
510-90 = 420 yuan
420 △ 2 = 210 yuan
210 × 8 = 1680 yuan
210 × 5 = 1050 yuan
(2)8x-4y=400
7x-1y=400

The iodine wine used for disinfection in hospital is mixed with iodine and alcohol according to the ratio of 1:50. At present, there are 35 grams of iodine. How many grams of iodine wine can be mixed?

1:50=35:1750
1750+35=1785
Answer: can match 1785g iodine wine

It takes 20 days for the two teams to build a road together. Given that the ratio of work efficiency of team a and team B is 3:2, how many days does it take for team B to finish the road alone?

50 days
If it takes 20 days for the two road repair teams to build a road together, the work efficiency of the two teams is 1 / 20, and the work efficiency of team B is 2 / 5 of the total work efficiency, so 1 / 20 * 2 / 5 = 1 / 50, the total work amount is 1, the total work amount / work efficiency of team B = Party B's working time, and 1 / 1 / 50 = 50 (days)