KCET 2007 Math Solved Paper

OA and OB are two roads enclosing an angle of 120∘.X and Y start from ' O ' at the same time. X travels along OA with a speed of 4‌km∕hour and Y travels along OB with a speed of 3‌km∕ hour. The rate at which the shortest distance between X and Y is increasing after 1 hour is