| 1. | A boat goes 75 km upstream in 3 hours and 60 km downstream in 1.5 hours. The speed of the boat in still water is ? | |
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32.5 kmph
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30 kmph
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65 kmph
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60 kmph
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Report Question| 2. | In a fixed time, a boy swims double the distance along the current that he swims against the current. If the speed of the current is 3 km/hr, the speed of the boy in still water is ? | |
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6 km/hr
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9 km/hr
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10 km/hr
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12 km/hr
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| 3. | The speed of the current is 5 km/hour. A motorboat goes 10 km upstream and back again to the starting point in 50 minutes. The speed (in km/hour) of the motorboat in still water is ? | |
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20
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26
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25
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28
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| 4. | The speed of a boat in still water is 10 km/hr. It covers (upstream) a distance of 45 km in 6 hours. The speed (in km/hr) of the stream is ? | |
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2.5
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3
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3.5
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4
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| 5. | A man rows a boat 18 kilometres in 4 hours downstream and returns upstream in 12 hours. The speed of the stream (in km per hour) is ? | |
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1
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1.5
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2
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1.75
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| 6. | A man can swim 3 km/hr. in still water. If the velocity of the stream is 2 km/hr., the time taken by him to swim to a place 10 km upstream and back is ? | |
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9 hr 40 min
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10 hr.
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12 hr.
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8 hr 40 min
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| 7. | A sailor goes 12 km downstream in 48 minutes and returns in 1 hour 20 minutes. The speed of the sailor in still water is ? | |
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12 km/hr
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12.5 km/ hr
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13 km/hr
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15 km/hr
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| 8. | Speed of a boat along and against the current are 12 km/hr and 8 km/hr respectively. Then the speed of the current in km/hr is ? | |
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5
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4
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3
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2
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| 9. | A boat takes half time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the current is ? | |
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2 : 1
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1 : 2
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4 : 3
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3 : 1
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| 10. | A man can row upstream at 12 km/hr and downstream at 18 km/hr. The man’s rowing speed in still water is ? | |
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15 km/hr
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5 km/hr
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3 km/hr
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10 km/hr
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