Nobita can row from a point A against a current for 30 minutes and then come back in favour of the current for the next 30 minutes and comes to the point B. If the distance of AB is 2`2/5` km, then find the speed of the current (in km/hr)?

- The speed of a boat in still water is 7.5 times the speed of the stream. If the difference between the upstream and downstream speed of the boats is 40 km/hr, then find the time taken by the boat to travel 260 km in upstream.
- The speed of the stream is 14 km/h. Boat ‘A’ covers 64 km distance against the stream in 4 hours and boat ‘B’ covers 95 km distance against the stream in 5 hours. The speed of boat ‘B’ in still water is how much percent of the speed of boat ‘A’ in still water?
- A Passenger boat started its journey from point A to B .After sometime when it is 156 km away from point B it is started to get sinking and passengers found a hole in it from which 10 `` tonnes of water comes in every 26 minutes. But there is a outlet tap which throws out 13 tones of water in every hour. So, find the speed of the boat so that while it is about to sink, another rescue ship which is coming towards it with speed of 14km/hr can save it and 94 tones of water is sufficient to sink that boat ?
- A man can row 13 km/hr in still water. When the river is running at 5 km/hr, it takes him 6.5 hours to row to a place and back. How far is the place?
- A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 5 hour to row to a place and come back, how far is the place?
- The ratio of the speed of boat ‘A’ in still water, the speed of boat ‘B’ in still water and the speed of the current is 8:6:2, respectively. If the time taken by boat ‘A’ to travel (5D – 15) km downstream is equal to the time taken by boat ‘B’ to travel (D + 70) km upstream, then find the value of ‘D’.
- A boy can swim a certain distance downstream in 5 hours and return in 7 hours. If the rate of stream is 4 kmph then what is the speed of boy in still water?
- The speed of a boat in still water is 6 km/hr and speed of current is 3 km/hr. If time taken to cover a certain distance upstream is 21 hours, then how long will the boat take to cover the same distance downstream?
- Speed of boat in still water is 60% more than speed of current and total time takes by boat to cover certain distance going downstream and upstream is 32 hours. Find the time taken by boat to cover same distance in still water.
- A man can row 6 km/hr in still water. If the speed of the current is 2 km/hr, it takes 5 hours more in upstream than in the downstream for the same distance. The distance is

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