1.A man rows at a speed of 6 km/h in still water. If the river current flows at 1.2 km/h, and it takes him exactly 1 hour to row to a certain point and return, what is the distance to that point?
2.A man swims 72 km downstream and 45 km upstream, taking 9 hours for each journey. What is the velocity of the current?
3.A swimmer covers 30 km downstream and 18 km upstream, taking 3 hours for each journey. What is the swimmer's speed in still water?
4.A boat travels at 25 km/h against the current and 35 km/h with the current. What is the speed of the river's current?
5.A person rows a boat at 25 km/h against the current and 35 km/h with the current. What is the speed of the boat in still water?
6.A person rows a boat at 15 km/h in still water. If the current flows at 5 km/h, what is the boat's speed while moving downstream?
7.A swimmer can swim at a speed of 4.5 km/h in still water. If it takes him twice as long to swim upstream compared to downstream, what is the velocity of the current?
8.A man rows his boat downstream at 6 km/h and upstream at 4 km/h. What is the speed of the stream?
9.A boat covers 100 km downstream in 10 hours and travels 75 km upstream in 15 hours. What is the speed of the current?
10.A swimmer can move at a speed of 4 km/h in still water. If the river current flows at 2 km/h, how long will it take him to swim 6 km upstream against the current?
11.A man rows a boat at 5 km/h in still water. If his speed against the current is 3.5 km/h, what is his speed when rowing with the current?
12.A man takes twice the time to row a certain distance upstream compared to rowing the same distance downstream. What is the ratio of the boat's speed in still water to the speed of the stream?
13.A boat travels in still water at a speed of 9 km/h, while the current flows at 1.5 km/h. If a man rows to a destination 105 km away and then returns to his starting point, how long does the entire journey take?
14.A person rows 0.75 km upstream in 11 minutes and covers the same distance downstream in 7 minutes. What is the rower's speed in still water in km/h?
15.A boatman travels 2 km upstream against the current in 1 hour and covers 1 km downstream with the current in 10 minutes. How much time will he require to travel 5 km in still water?
16.A man rows at a speed of 9 1/3 km/hr in still water. He notices that rowing upstream takes three times as long as rowing downstream over the same distance. What is the velocity of the river current?
17.A boat takes 3 hours to travel from point B to point A against the current and then return from A to B with the current. Given that the boat's speed in still water is 9 km/h and the current flows at 3 km/h, what is the distance between points A and B?
18.A boat travels at 2 km/hr in still water. If its upstream speed is 1 km/hr, what is the velocity of the current?
19.A boat takes half the time to travel a certain distance downstream compared to upstream. What is the ratio of the boat's speed in still water to the speed of the current?
20.A boatman rows 2 kilometers against the stream in 1 hour and covers 1 kilometer downstream in 10 minutes. How much time will he require to travel 5 kilometers in still water?