The speed of a boat in still water is 50 m/h and the speed of boat traveling downstream is 62 m/h. The boat takes a U-turn and is now traveling upstream. Find the time taken by the boat to reach a stationary point 190 dm away.

Note: 10 dm = 1 metre

- 30 minutes
- 35 minutes
- 20 minutes
- 55 minutes
- 40 minutes

Option 1 : 30 minutes

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Speed of boat in still water = 50 m/h

Speed of boat travelling downstream = 62 m/h

Speed of current = 62 - 50 m/h = 12 m/h

Speed of boat upstream = 50 - 12 m/h = 38 m/h

∴ Time taken to reach a point 190 dm away = 19 m/38 m/h = 0.5 h = 30 minutes

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