I have 48 procedures sitting in a PL/SQL package. when I execute the package I have to select one procedure at a time to get it executed. What could I do to execute the package once and get all the procedures executed at the same time sequencially.

A package is just a bag of routines and stuff, somewhat like a library. You cannot execute a package, only the procedures within it.

You need to write another procedure, or anonymous PL/SQL block, like this:

BEGIN
pkg.proc1;
pkg.proc2;
...
pkg.proc48;
END;
/

Thank you very much