Cat command with variable in file name not working

I want to cat or read the contents of file giving absolute path that contains a variable but its not working..

None of the below commands are working.
($ line here is the name of file)

content=`(cat /tmp/cygwin/cygwin/home/67642360/1.0.94/db/src/sql/oracle/updates/$  {line})`  cat '/tmp/cygwin/cygwin/home/67642360/1.0.94/db/src/sql/oracle/updates/'$  {line}