Cuda installation for Ubuntu 18.04 - Very Slow download


I have the following problem.

I am trying to install cuda Toolkit 10.2 in Ubuntu 18.04 and the installation process takes too long. I followed all the instructions before the installation process and I have executed all the command lines of the installation process. The ways I tried to install the toolkit were both the deb(local) and the deb(network). In both, the download is very slow (10-200 kB/s)(my network’s speed is around 50Mbps) and currently I wait all the needed files to be downloaded by the execution of the last command:

sudo apt-get -y install cuda

Any help please?