TS EAMCET Medical 2018 May 3 Shift 1Paper

A boat sails on a river against the current from point A to point B and back to point A again. The boat maintains same velocity in relation to water in both cases. The velocity of water current is 3 km/h. If the ratio of the time the boat takes to sail from point A to point B to point A and the time it would take to cover the same distance on a still lake is 1.5, the velocity of the boat is