A man can row at the rate of 4 km/hr in still water. If the time taken to row a certain distance upstream is 3 times as much as to row the same distance downstream, find the speed of the current?

• ক 3 km/hr
• খ 4 km/hr
• গ 2 km/hr ✅ সঠিক উত্তর
• ঘ 1 km/hr