1800000/20=90000 bags, and the time is 90000*4=360000 hours. According to (2), we know that the product can be produced in 80,000 years.
Between 90,000 bags, because raw materials determine the production capacity, the production capacity can only be 90,000 bags, and the required labor force is about 360,000/2100 =171.
mankind
② 1. If you buy X TV sets and refrigerators, the washing machine will be (15-2x).
15-2x≤ 1/2x
2000 x+2400 x+ 1600( 15-2x)≤32400
According to the meaning of the question:
Solve this inequality group and get 6≤x≤7.
∵x is a positive integer, ∴x=6 or 7.
Scheme 1: Buy 6 TVs and refrigerators and 3 washing machines;
Option 2: Buy 7 TV sets and 7 refrigerators, 1 washing machine.
(2) Scheme 1 needs subsidies: (6× 2100+6× 2500+1×1700) ×13% = 4251(RMB.
Scheme 2 needs subsidies: (7× 2100+7× 2500+1×1700) ×13% = 4407 yuan;
The national fiscal revenue needs to subsidize farmers at most 4407 yuan.
A: The national fiscal revenue needs to subsidize farmers up to 4,407 yuan.
③ Solution: (1) Assuming that Type A has X models, Type B has (50-x) models, depending on the meaning of the problem.
To solve this set of inequalities,
∴3 1≤x≤33
∵x is an integer,
∴x can be 3 1, 32, 33.
∴ Three collocation schemes can be designed.
① Gardening model A+0 Gardening model B+65,438+09 has 365,438.
② There are 32 A-type gardening shapes and 8 B-type gardening shapes/kloc-0.
③ There are 33 A-type gardening shapes and 7 B-type gardening shapes/kloc-0.
(2) Method 1:
Because the cost of type B is higher than that of type A, the less type B, the lower the cost. Therefore, scheme ③ should be selected, with the lowest cost and the lowest cost as follows.
33×800+ 17×960=42720 (yuan)
Method 2:
Scheme 1 costs 31× 800+19× 960 = 43,040 yuan.
The cost of scheme ② is 32× 800+18× 960 = 42,880 yuan.
The cost of scheme ③ is 33× 800+17× 960 = 42,720 yuan.
Option ③ should be selected, and the minimum cost is 42,720 yuan.
Finally, I wish you success in your studies!