In order to support the reconstruction of the earthquake stricken area of Yushu, Qinghai Province, a company rented eight trucks of different models a and B to transport 250 cases of drugs and 370 cases of daily necessities to Yushu, Qinghai Province. It is known that a type a truck can transport 30 cases of drugs and 50 cases of daily necessities, and a type B truck can transport 50 cases of drugs and daily necessities Supplies 40 cases. What kind of car rental scheme do you have? Please help to design it

In order to support the reconstruction of the earthquake stricken area of Yushu, Qinghai Province, a company rented eight trucks of different models a and B to transport 250 cases of drugs and 370 cases of daily necessities to Yushu, Qinghai Province. It is known that a type a truck can transport 30 cases of drugs and 50 cases of daily necessities, and a type B truck can transport 50 cases of drugs and daily necessities Supplies 40 cases. What kind of car rental scheme do you have? Please help to design it

Let's rent X type a freight cars and (8-x) type B freight cars. According to the meaning of the question, it is obtained that 30x + 50 × (8 − x) ≥ 25050x + 40 × (8 − x) ≥ 370, and the solution is that 5 ≤ x ≤ 7.5  x = 5, 6, 7. There are three kinds of car rental schemes: 5 type a freight cars and 3 type B freight cars; 6 type a freight cars and 2 type B freight cars; 7 type a freight cars and 1 type B freight car