Updated: Question in GATE 2012 Civil Engineering Paper with Solution

A question in GATE 2012 Civil Engineering Paper with Solution has been updated:

The following data are related to a horizontal curved portion of a two lane highway: length of curve = 200 m, radius of curve = 300 m and width of pavement = 7.5 m. In order to provide a stopping sight distance (SSD) of 80 m, the set back distance (in m) required from the centre line of the inner lane of the pavement is

1. 2.54
2. 7.96
3. 7.10
4. 4.55