A guard is positioned at the one side of bridge say 'A'. * His task is to shoot.........How did Leena cross the river ?

Question

A guard is positioned at the one side of bridge say 'A'.
* His task is to shoot all those who try to leave from 'A' to other side say 'B'.
* He also need to welcome the person who come from other side 'B' to his side 'A'.

The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave.
Leena a brilliant girl is at side 'A' and wish to go to other side 'B'. She also know's it would take her 1:45 hr to cross the river.

She comes with an super idea and able to cross the river.How did Leena cross the river ?

Answer 1

Leena can start 5 min after Guard check from point A and go for 50 min forward, she then returns for 5 min while the next guard checking. During return period the Guard would think Leena is coming from point B! After Guard check Leena is at 45 min distance from point A and can go for a further one hour to reach the point B.