26 questions · Difficulty 1/3
1.A motorboat whose speed is 20 km/h in still water takes 30 minutes more to go 24 km upstream than to cover the same distance downstream. If the speed of the boat in still water is increased by 2 km/h, then how much time will it take to go 39 km downstream and 30 km upstream?
2. A boatman can row his boat in still water at a speed of 9 km/h. He can also row 44 km downs tream and 35 km upstream in 9 hours. How much time (in hours) will he take to row 33 km downstream and 28 km upstream?
3. A boat can cover a distance of 56 km downstream in 3.5 hours. The ratio of the boat in still water and the speed of stream is 3:1. How much time (in hours) will the boat take to cover a distance of 41.6 km downstream?
4.Anup can row 33 km downstream and 35 km upstream in 8 hours. He can also row 44 km downstream and 28 km upstream in the same time. How much time (in hours) will he take to row 55 km downstream and 14 km upstream?
5.X, Y are two points in a river. Points P and Q divide the straight line XY into three equal parts. The river flows along XY and the time taken by a boat to row from X to Q and from Y to Q are in the ratio 4 : 5. The ratio of the speed of the boat downstream that of the river current is equal to:
6. A boat goes 27 km upstream and 33 km downstream in 6 hours. In the same time it can go 36 km upstream and 22 km downstream. How much time will it take to go 36 km upstream and 44 km downstream?
7. A man can row a distance of 8 km downstream in a certain time and can row 6 km upstream in the same time. If he rows 24 km upstream and the same distance downstream in 1 3/4 hours, then the speed (in km/h) of the current is:
8.A boat can go 5 km upstream and 7 1/2 km downstream in 45 minutes. It can also go 5 km downstream and 2.5 km upstream in 25 minutes. How much time (in minutes) will it take to go 6 km downstream?
9. A boat goes 30 km upstream in 3 hours and downstream in 1 hours. How much time (in hours) will this boat take to cover 60 km in still water?
10.A boat covers a round trip journey between two points A and B in a river in T hours. If its speed in still water becomes 2 times, it would take 80/161T hours for the same journey. Find the ratio of its speed in still water to the speed of the river.
11.The speed of a motorboat in still water is 20 km/h. It travels 150 km downstream and then returns to the starting point. If the round trip takes a total of 16 hours, what is the speed (in km/h) of the flow of river?
12. A boat can travel with a speed of 19 km/h in still water. If the speed of the stream is 3 km/ h, then what will be the total time (in hours) taken by the boat to go 88 km downstream and 24 km upstream?
13. Ravi can row a boat in still water at the speed of 14 km/h. If a river is flowing at the speed of 2 km/h and Ravi takes 3 hours to cover a certain distance upstream, then how much time will he take to cover the same distance downstream?
14. Sunil can row a boat 20 km upstream in 1 hour 15 minutes. If the speed of the current of the river is 2 km/h, then how much time will he take to row the boat 30 km downstream?
15. A boat can go 15 km downstream and 8 km upstream in 2h. It can go 20 km downstream and 12 km upstream in 2h 50 min . What is the speed (in km/h ) of the boat while going downstream?
16.The speed of a boat downstream is 150% more than its speed upstream. If the time taken by the boat for going 80km downstream and 50km upstream is 8.2 hours, then what is the speed (in km/h) of the boat downstream?
17.A person rows upstream a distance of 55km in 5 hours and rows downstream a distance of 75km in 3 hours. How much time will he take to row a distance of 96km in still water?
18.The speed of a boat downstream is 2.5 times the speed of the boat upstream. If the time taken by the boat for going 30 km downstream and the same distance upstream is 7 hours, then what is the speed (in km/h) of the boat downstream?
19. A man can row5 km/h in still water. If the speed of the current is 2.5 km/h, it takes 4 hours more in upstream than in the downstream for the same distance. The distance is:
20.A watercraft is rowed down 32 km along a river in 4 hours and 10 km against the river in 5 hours. Find the speed of the watercraft and that of the river.
21. A boat’s speed in still water is 22 km/h, while the river is flowing with a speed of 8 km/h and the time taken to cover a certain distance upstream is 4 hours more than the time taken to cover the same distance downstream. Find the distance.
22.A man can swim in still water at a speed of 6 km/h, but he takes thrice as long to swim upstream as downstream. The speed of the man, when swimming downstream is:
23.A woman can row 36 km downstream in 4 hours and 49 km upstream in 7 hours. What is the speed of the current?
24.A boat can travel 18 km in 3 hours while going upstream, and 40 km in 4 hours while going downstream. What is the speed of the boat in still water?
25.The speed of a boat going downstream is 22 km/h. The speed of the stream is 1 km/h. How much distance in total will the boat cover going 3 hours downstream and 2 hours upstream?
26.A boat takes a total of 2 hours to cover 9 km downstream and return, given that the speed of the stream is 6 knvh. What is the speed of the boat in still water?