1. A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream. (3)
- 1. 2 hours
- 2. 3 hours
- 3. 4 hours
- 4. 5 hours
2. A man’s speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man’s speed against the current is: (3)
- 1. 8.5 km/hr
- 2. 9 km/hr
- 3. 10 km/hr
- 4. 12.5 km/hr
3. A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively? (3)
- 1. 2 : 1
- 2. 3 : 2
- 3. 8 : 3
- 4. Cannot be determined
- 5. None of these
4. A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is: (2)
- 1. 4
- 2. 5
- 3. 6
- 4. 10
5. In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is: (3)
- 1. 3 km/hr
- 2. 5 km/hr
- 3. 8 km/hr
- 4. 9 km/hr