|There is no answer to that question, it is a how long is a piece of string type question. There are so many variables involved it is impossible to say as it will vary depending on what is happening at any given moment. One thing for sure it is not going to be particularly fast if 50 are using the network simultaneously.|
Do you have a standard 100 MB network or a 1 GB network.
What kind of data are these people downloading, are they all likely to be downloading together or spasmodically. Are they downloading files or are they accessing a common database.
I have just read the title and all the above is for a Local Area Network. If you mean downloading from the Internet, all the above applies and a lot more besides not least of all the bandwidth given to you by your ISP.