how long can i pull utp cable to give internet connection.?

You are over the maximum recommended distance for UTP... by 50%.

If this works or not depends on:

Quality of the cable (cat 5 / 5e/ 6 ...)

How well the end-points were connected (how much twist was lost)

What sort of EMI the cable can pick up (how many sources of electro-magnetic interference there are and how strong they are)

What speed you're using across the connection.

Quality of the end point interfaces

In general... if it's in a duct it's better than un-ducted, if you use a cable rated an 100Mbit for a 10Mbit connection it's going to be better than using a 100Mbit cable for 100Mbit, if you wind it round a lift motor it'll be worse than not running round a lift motor, if you run it alongside an AC feed it'll be worse than running free of mains cables... and so on.

What will the hit be? The signal will be attenuated by the extra length of wire (it'll be weaker) so the cards will have to work harder to get the signal back. The signal will be smeared out similarly bu the capacitance of the wire... so the cards will have to work harder. Any interference will make the work of the cards harder, so more packets will need re-sending.

There's a couple of points in the hit... if the wiring is good enough for the signal to get through and be identified correctly then it'll work... if it's too weak or too smeared out then it won't work. With a working signal, because it's closer to the thresholds of detection

it will take less noise before signals have to be re-sent. So, more of the bandwidth will be used re-sending data that got lost in the noise.

So what works now may degrade if other equipment is installed around the cable. What is 'acceptable' now may become unacceptable if you add more users (if you are using 10% and it spends 30% retrying that's OK... if you want to use 40% and it spends 120% retrying, you won't get the throughput). What works now may not work if you go to 100Mbit or 1Gbit... even if you used cable rated for 100Mbit or 1Gbit.

If you put a repeater into the line about half eay then you've a much better chance of it working. A small switch would do the job.

Utp Internet

Cat 5 cable being used in a 1GB switch can be up to 90m (295ft) long.

If you go beyond this limit you may/will run into crosstalk issues, lost packets and speed degradation. It may not be bad depending on where you run your cable. (i.e. not close to any power sources, other data cables, lights, TV, radio, etc)

You best option would be to use a small Ethernet hub half way along the run. This would provide a more reliable 75m run.