please solve ques 22........................................

I think the answer would be root 3 M.

Please leave aside the inclined magnet.now the other two magnets are placed with a angle of 90 between them. So the resultant would be root2 m.  RIGHT?  Now consider the inclined magnet which makes an angle of 90 degree with the resultant if the dirstbtwo magnet.    Note that the magnet makes 45 degrees only with the magnets in the initial position and not mentioned to be the resultant. So now the resultant may be (root 2 m and m). Root3m