1. A man can row 30 km uptream and 44 km downstream in 10 hrs. Also, he can row 40 km upstream and 55 km downstream in 13 hrs. find the rate of the current and the speed of the man in still water. (1)
-
- (1) 3 km/hr, 8 km/hr
- (2) 3 km/hr, 7 km/hr
- (3) 4 km/hr, 6 km/hr
- (4) 8 km/hr,3km/hr
- (5) None of these
2. A boat travels upstream from B to A and downstream from A to B in 3 hrs. If the speed of the boat in still water is 9 km/hr and the speed of the current is 3 km/hr, the distance between A and B is (3)
- (1) 8 km
- (2) 16 km
- (3) 12 km
- (4) cannot be determined
- (5) None of these
3. A man can row 6 km/hr in still water. If the speed of the current is 2 km/hr, its takes 3 hrs more in upstream than in the downstream for the same distance. The distance is (2)
- (1) 30 km
- (2) 24 km
- (3) 20 km
- (4) 32 km
- (5) None of these
4. A man can row 5 km/hr in still water. If the river is running at 1 km/hr, it takes him 75 min to row to a place and back. How far is the place? (2)
- (1) 2.5 km
- (2) 3 km
- (3) 4 km
- (4) 5 km
- (5) None of these
5. A motorboat can travel at 10 km/hr in still water. It travelled 91 km downstream in a river and then returned, taking altogether 20 hrs. Find the rate of the flow of the river (4)
- (1) 6 km/hr
- (2) 5 km/hr
- (3) 8 km/hr
- (4) 3 km/hr
- (5) None of these