Sheela walks from A to B which is 2 km, away turns right at 90∘ and walks for 3 km, to point C turns right at 90∘ and walks to D which is 8 km, away, turns 90∘ right and goes 3 km, to point K Then once again the she turns right 90∘ and walks 4 km to pint F how far is it from A to F?