Boats and Streams Quiz 4 April 10, 2012 by kumar Leave a Comment 1. A man can row with a speed of 15 km/hr in still water. If the stream flows at 5 km/hr then his speed in downstream is ______ A. 20 km/hrB. 30 km/hrC. 15 km/hrD. 40 km/hr 2. A man can row upstream at 25 km/hr and down stream at 35 km/hr then find the speed of the man in still water. A. 60 km/hrB. 45 km/hrC. 15 km/hrD. 30 km/hr 3. A man can row upstream at 21 km/hr and downstream at 25 km/hr, then the speed of current is ____? A. 4 km/hrB. 2 km/hrC. 8 km/hrD. 37 km/hr 4. A man swims downstream 30 km and upstream 18 km taking 3 hours each time what is the speed of the man in still water? A. 58 km/hrB. 4 km/hrC. 8 km/hrD. None of the above 5. A man can row 6 km/hr in still water. When the river is running at 1.2 km/hr, it takes him 1 hour to row to a place and back. How far the place? A. 6.77 kmB. 7.65 kmD. 7.24 kmD. 2.88 km 6. A man can row 25 km/hr in still water and the stream is flowing at 15 km/hr and takes him 15 hours to row to a place and back. How far is the place? A. 40 kmB. 80 kmC. 120 kmD. 240 km 7. The current of a stream runs at the rate of 4 km/hr. A boat goes 6 km and back to the starting point in 2 hours, then find the speed of boat in still water. A.10 km/hrB. 2 km/hrC. 8 km/hrD. None of the above 8. The current of a stream flows at 1 km/hr. A boat goes 35 km upstream and back to the starting point in 12 hours. The speed of the boat in still water is __? A. 2 km/hrB. 13 km/hrC. 1 km/hrD. 4 km/hr 9. A man whose speed is 4.5 km/hr in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 km/hr. Find his average speed for the entire journey. A. 6 km/hrB. 12 km/hrC. 4 km/hrD. 8 km/hr 10. Speed of a boat in still water is 7 km/hr and speed of the stream is 1.5 km/hr. A distance of 7.7 km in upstream is covered in how many minutes? A. 8.5 km/hrB. 1.5 km/hrC. 3.5 km/hrD. 2.5 km/hr Related posts: Boats and Streams Quiz 1 Boats and Streams Quiz 2 Boats and Streams Quiz 3

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