A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 9 km in stationary water?

• ক 1 hr 45 min
• খ 1 hr 15 min
• গ 2 hr 15 min ✅ সঠিক উত্তর
• ঘ 2 hr 30 min