A man can swim a distance of 360 m in still water in 4 minutes. If the speed of the current is 1 m / sec, how much time will he take to cover the distance of 180 m upstream?

• ক 5 minutes
• খ 7 minutes
• গ 6 minutes ✅ সঠিক উত্তর
• ঘ 8 minutes