Question 22207
This is a weird question, because there is not enough information. If we assume lots of different things, like the other people are faster or there is a lightened load that speeds up the group, then there are all sorts of scenarios. Yet we are still faced with the fact that they have to eat too, and we don't know whether or not they picked up supplies for the return trip. Bottom-line though, no matter how many people you add, if they all travel the same speed, since we can't assume, then they will all cross the desert at the same speed. I'm far from an expert, but this sounds like a bad question.