The officers of a high school senior class are planning to rent buses and vans for a class trip. Each bus can transport 35 students, requires 2 chaperones, and costs $1400 to rent. Each van can transport 7 students, requires 1 chaperone, and costs $90 to rent. Since there are 350 students in the senior class that may be eligible to go on the trip, the officers must plan to accommodate at least 350 students. Since only 26 parents have volunteered to serve as chaperones, the officers must plan to use at most 26 chaperones. How many vehicles of each type should the officers rnt in order to minimize the transportation costs? What are the minimal transportation costs?
Bus | Van | Available | |
No of students | 35 | 7 | 350 |
Chaperons | 2 | 1 | 26 |
cost | 1400 | 90 |
Let x be the no of buses and y the vans
Objective is to minimise total cost Z = 1400x + 90y
Then 35x+7y >=350 or 5x+y>=50
2x+y<=26
Hence feasible solutions are
Z = 1400x + 90y
(10,0) (13,0) and (8,10)
Z for (10,0) = 14000
Z for (13,0) = 18200
Z for (8,10) = 12100
Hence minimal transportation cost is 12100 with 8 buses and 10 vans.
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