d question should b asked lyk dis... "what would d other guard say if i ask him whether his way leads to pawai lake...? "
whatever b d answer given by d guard... if v take d other way... v shall reach pawai lake...
let me explain...
suppose u go to a guard who says truth... n suppose dat his way leads to pawai lake... den he answers to our question in dis manner... " the other guard will say dat his path will lead to pawai lake..."
now, if u go to d guard who says lies... n suppose dat his way leads to pawai lake... den he answers to our question in dis manner... " the other guard will say dat his path will lead to pawai lake... "
now suppose, if u go to d guard who says truth... n suppose dat his way doesn't lead to pawai lake... den he answers our question in dis manner... " the other guard will say dat his way doesn't lead to pawai lake..."
now again, if u go to d guard who says lies... n suppose his path doesn't lead to pawai lake... den he answers to our question in dis manner... " the other guy will say dat his path doesn't lead to pawai lake... "
in all four cases... if v take d path other dan d one which -according to d reply given leads to pawai lake-... v shall reach pawai lake...
[1]