Related Questions

If a boat goes upstream at a speed of 18 km/hr and comes back the same distance at 30 km/hr. What is the average speed (in km/hr) for the total journey?
A 22.5
B 24
C 20.5
D 25
A boat goes a certain distance at 40 km/hr and comes back the same distance at 24 km/hr. What is the average speed (in km/hr) for the total journey?
A 32
B 28
C 34
D 30
If a boat goes a certain distance at 30 km/hr and comes back the same distance at 60 km/hr. What is the average speed (in km/hr) for the total journey?
A 45
B 50
C 40
D 35
The ratio of the speed of boat in still water to the speed of stream is 16 :5. A boat goes 16.5 km in 45 minute upstream. Find the time taken by boat to cover the distance of 175 km downstream.
A 30minutes
B 25minutes
C 50minutes
D 45minutes
The ratio of the speed of boat in still water to the speed of stream is 16: 5. A boat goes 16.5 km in 45 minute upstream . Find the time taken by boat to cover the distance of 17.5 km downstream .
A 30 minutes
B 25 minutes
C 50 minutes
D 45 minutes
The ratio of the speed of boat in still water to the speed of stream is 16 : 5. A boat goes 16.5 km in 45 minute upstream , find the time taken by boat to cover the distance of 17.5 km downstream .
A 30 minutes
B 25minutes
C 50 minutes
D 45 minutes
A person goes from point N to P and comes back. His average speed for the whole journey is 60 km/hr. If his speed while going from N to P is 40 km/hr, then what will be the speed of the person (in km/hr) while coming back from P to N?
A 80
B 100
C 120
D 140
If a boat goes 7 km upstream in 42 minutes and the speed of the speed of the stream is 3 kmph, the speed of the boat in still water is
A 4.2 km/hr
B 9 km/hr
C 13 km/hr
D 21 km /hr
A steamer moves with a speed of 4.5 km/h in still water to a certain upstream point and comes back to the starting point in a river which flows at 1.5 km/h. The average speed of steamer for the total journey is
A 12 km\/h
B 10 km\/h
C 6 km\/h
D 4 km\/h
If a boat goes 7km upstream in 42 minutes and the speed of the stream is 3kmph,then the speed of the boat in still water is-
A 4.2 km/hr
B 9km/hr
C 13km/hr
D 21km/hr

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