Veena and Veeru both start from a point towards North. Veena turns to left-after walking 10 km. Veeru turns to right after walk-ing the same distance. Veena waits for some time and then walks another 5 km. Whereas Veeru walks only 3 km. They both then return towards South and walk, 15 km. forward. How far is Veena from Veeru?