The Original duration in days, varies from the difference between Start and Finish dates

Member for

18 years 11 months

Dileep,

1. Is your calendar's "Hours/Day" (in the calendar's Hours per Time Period window) still set on 8.0? 

2. If not, then check the Time Periods tab of the Admin Preferences to ensure that the box for "Use assigned calendar to specify the number of work hours for each time period" is checked.

It looks like your hours/day conversion factor was set to 8.0, and you have given the activity a duration of 36x8=288 hours.  After correcting the conversion factor, you may have to re-enter some affected durations.

Good luck.