How to make the model to solve with solver?

yabi100

Board Regular
Joined
Aug 10, 2013
Messages
81
Office Version
  1. 2016
Platform
  1. Windows
I am trying to solve following question with solver, however I can’t figure out how to build the model. Any help is appreciated.

I have 8 camions and each camion’s capacity is How8 ton. I want to transport 2500 tons of wheat from point A to 3 silos. Silos capacity and required travel time are as follows:

Silo 1) 30% of total load should go to this silo with travel time of 3.5 hours

Silo 2) 50% of total load should go to this silo with travel time of 2.5 hours

Silo 3) 20% of total load should go to this silo with travel time of 2 hours.

Totally I have 20 hours to do the job.

I have made following model but it is not correct and solver can’t find a solution.

Specially I don’t know how to impose travel time limitation (row number 6 in the table)? Without travel time limitation, there is a result. Is it possible that the question is wrong with no answer?

Numbers I entered the table are for building the model and are not answer of the question.
 

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