hello i have a prb with this exercice can any give me a hand

We must supply a prefabricated construction. These elements

be routed

the plant site by truck classic semi-trailer

the length of

loading is 13.5 meters. There are three types of items

Precast:

• Elements of Type 1 with 5 linear feet

• Elements of Type 2 uses 4 linear feet

• Elements of Type 2 occupant 2.5 m linear

Any combination of elements can be transported in one truck:

for example,

can load a truck with two Type 1 and Type Element

3. Which occupies

2 * 5 +2.5 = 12.5 m linear. It then remains unoccupied one meter (rate

loading 92.5%). The

Plan loading of each truck may be different.

The volumes to be delivered to the site before it starts are

10 elements of type 1, 9

elements of type 2 and type 3 of 15 items.

How many trucks should be used to supply at least this site

?

1. Propose a heuristic to provide a good solution

this problem.

2. Propose a model of this problem to provide solution optimal form of linear program specifying the notation used, decision variables etc..

thanks,