Boats and Streams Quiz 1 February 6, 2012 by kumar 1. A man can row a boat at 10km per hour in still water.If the speed of the stream is 6 km/hr,what is the time taken to row a distance of 80 km down the stream?A. 14 hrB. 15 hrC. 10 hrD. 20 hr 2. A man can row 8.5 kmph in still water.If in a river running at 2.5 kmph;it takes him 70 seconds to row to a place and back,how far off is the place?A. 3.5 kmB. 4 kmC. 4.5 kmD. 5 km 3. A boat takes 4 hours for travelling downstream from X to Y and coming back to X upstream.If the velocity of the stream is 2kmhr and the speed of the boat in still water is 4 kmph.What is the distance between X and Y?A. 4 kmB. 6 kmC. 9 kmD. 12 km 4. A boat rows downstream 30 km and 10 km upstream.If it takes 5 hours to cover the distance,then the velocity of the current is(kmph)A. 4B. 6C. 8D. 2 5. A boat takes thrice as long to row a distance against the stream as to row the same distance in favour of the stream.The ratio of the speed of the boat(still in water) and the stream isA. 3:2B. 4:3C. 2:1D. 6:5 6. A man covers 24 km upstream and 36 km downstream in 6 hours while it covers 36 km upstream and 24 km downstream in 6 1/2 hours.The velocity of the current isA. 3 km/hrB. 4 km/hrC. 2 km/hrD. 7 km/hr 7. A boat rows at the rate of 12 kmph in one direction and 4 kmph in opposite direction,then the boat's rate along the current is A. 20 kmphB. 30 kmphC. 40 kmphD. 50 kmph 8. The speed of a man in water is 30 km/hr ,he can travel 40 km in downstream and 30 km in upstream in same time.Find the speed of the stream isA. 3.28 kmphB. 5.67 kmphC. 4.28 kmphD. 2.14 kmph 9.The speed of the boat is 6 km/hr when the stream is running at 1.2 km/hr.It takes the boat 1 hour to row to a place and back.How far it from the place?A. 1.18 kmB. 2.88 kmC. 1.58 kmD. none 10. A man can row 36 kmph in water.The stream takes him twice as long to row up as to row down the stream.Find the rate of stream?A. 10 km/hrB. 15 km/hrC. 20 km/hrD. 12 km/hr 11. If the speed of the river is 6 kmph,a man can cover certain distance downstream in 2 hours and 2 1/2 hours upstream.Find the speed of the boat in water?A. 54 kmphB. 56 kmphC. 30 kmphD. 40 kmph 12. Find the velocity when a man rows upstream 16km and downstream 28km taking 5 hours?A. 3.2 km/hrB. 1.2 km/hrC. 4.8 km/hrD. 3.6 km/hr 13. A man can row upstream at 10 kmph and downstream in 12kmph .Find the speed of the stream isA. 13 kmphB. 11 kmphC. 10 kmphD. 5 kmph 14. A boat can move 14 km in 35 minutes and speed of the stream is 4 kmph,The speed of the boat in still water is A. 32 kmphB. 26 kmphC. 42 kmphD. 28 kmph 15. A man travels a certain distance in the direction of stream in 6 hr and the same distance in the opposite direction in 9 hrs. If the speed of the stream is 3 kmph ,then what is the speed of the man in still water isA. 45 km/hrB. 14 km/hrC. 15 km/hrD. 20 km/hr No related posts.