Boats and Streams - Questions and Answers

16. The current of a stream runs at 1 km/hr. A motor boat goes 35 km upstream and back again to the starting point in 12 hours. The speed of motorboat in still water is :

17. Speed of a boat in standing water is 6 km/hr and the speed of the stream is 1.5 km/hr A man rows to a place at a distance of 22.5 km and comes back to the starting point. The total time taken by him :

18. A man can swim 3 km/hr in still water. If the velocity of the stream be 2 km/hr, the time taken by him to swim to place 10 km upstream and back, is :

19. A boat moves upstream at the rate of 1 km in 10 minutes and downstream at the rate of 1 km in 6 minutes. The speed of the current is :