2 version of Cmake, needs to remove one

I’m having an issue with Cmake.
I’m using Ubuntu 18.04 and have installed the newest version of Cmake (3.18.0).
Since I’m kind of new to Linux in general, I thought installing new version will override the last version and simply update it, unfortunately I was wrong.
Now sometimes when I try to set minimum version to above 3.10, I’m getting the follwing error:

CMake 3.17 or higher is required.  You are running version 3.10.2

It’s obviously that I need to remove the older version, but I’m not sure how to remove a specific version, whenever I try to locate the Cmake folder, the directory is:

/usr/local/bin/cmake

Which isn’t the directory, specifically not the directory that I need (3.10.2 one).

How can I remove specific version of Cmake?
Thanks for the help.

EDIT
As suggested on the comment below, the output of which -a cmake:

/usr/local/bin/cmake
/usr/bin/cmake

The Cmake at /usr/bin/cmake is the bad version (3.10.2).