A man row 6 km/h in still water .If the speed of the current is 2 km/h, it takes 3 hours more in upstream than in the downstream for the same distance. The distance is
1). 30 km
2). 24 km
3). 20 km
4). 32 km
Two boats A and B start towards each other from two places, 108 km apart. Speed of the boat A and B in still water are 12km/hr and 15km/hr respectively. If A proceeds down and B up the stream ,they will meet after.
1). 4.5 hours
2). 4 hours
3). 5.4 hours
4). 6 hours
A man goes downstream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the stream are 10km/hr and 4 km/ hr respectively, the distance of the destination from the starting place is
1). 16 km
2). 18 km
3). 21 km
4). 25 km
The speed of a motor-boat is that of the current of water as 36:5. The boat goes along with the current in 5 hours 10 minutes. It will come back in
1). 5 hour 50 minutes
2). 6 hours
3). 6 hours 50 minutes
4). 12 hours 10 minutes
A man can row at 5 kmph, in still water. If the velocity of current is 1 kmph. and it takes him 1 hour to row to a place and come back, how far is the place
1). 2.5 km
2). 3 km
3). 2.4 km
4). 3.6 km