>> Aptitude >> Boat and Stream
1). A boat goes 20 km upstream in 2 hours and downstream in 1 hour. How much time this boat will take to travel 30 km in all still water?
A). 1 hr B). 2 hrs
C). 1.5 hrs D). 2.5 hrs
2). In the above question, the speed at which the stream is flowing is
A). 10 km/hr B). 20 km/hr
C). 15 km/hr D). 5 km/hr
3). A boat travels 10 km in 1 hr downstream and 14 kms in 2 hrs upstream. How much time this boat will take to travel 17 kms in still water?
A). 1 hr B). \( \Large 2\frac{1}{2} \) hrs
C). 2 hrs D). \( \Large 3\frac{1}{2} \) hrs
4). A man goes by motor boat a certain distance upstream at 15 km/hr and return the same downstream at 20 kin/hr. The total time taken for the journey was 7 hrs. Find how far did he go.
A). 60 km B). 50 km
C). 40 km D). 120 km
5). A man can row upstream a distance of \( \Large \frac{2}{3} \) km in 10 minutes and returns the same distance downstream in 5 minutes. Ratio of man's speed in still water and that of the stream will be
A). 3 : 1 B). 1 : 3
C). 2 : 3 D). 3 : 2
6). A man can row a certain distance down stream in 6 hours and return the same distance in 9 hours. If stream flows at the rate of 2 km/hr, then what will be man's speed if he rows in still water?
A). 10 km/hr B). 12 km/hr
C). 14 km/hr D). 15 km/hr
7). A boat against the current of water goes 9 km/hr and in the direction of the current 12 km/hr. The boat takes 4 hours and 12 minutes to move upwared and downward direction from A to B. What is the distance between A and B?
A). 21.6 km B). 21.0 km
C). 22 km D). 30 km
8). A man takes 3 hours and 45 minutes to boat 15 km with the current in a river and 2 hours 30 minutes to cover a distance of 5 km against the current. Speed of the boat in still water and speed of the current respectively will be
A). 3 km/hr, 1 km/hr B). 1 km/hr, 3 km/hr
C). 2 km/hr, 4 km/hr D). none of these
9). A boat can be rowed 6 km/hr along the current and 4 km/hr against the current. Speed of the current and speed of the boat in still water, respectively will be
A). 1 km/hr, 5 km/hr B). 5 km/hr, 1 km/hr
C). 2 km/hr, 4 km/hr D). none of these
10). A boat moves down the stream at the rate of 1 km in 6 minutes and up the stream at the rate of 1 km in 10 minutes. The speed of the current is
A). 2 km/hr B). 1 km/hr
C). 1.5 km/hr D). 2.5 km/hr