# Ramnath V.R

**Calculus**Level 2

Two ships A & B are sailing straight away from a fixed point O along Routes such that angle AOB is always 120 degree. at a certain instance, OA=8 km OB=6 km and the ship A is sailing at the rate of 20 km/hr while the ship B sailing at the rate of 30 km/hr. Then the distance between A and B is changing at the rate of(in km/hr)is..........???