1. In a river flowing at 2 km/hr, a boat travels 32 km upstream and then returns downstream to the starting point. If its speed in still water is 6 km/hr, find the total journey time. (b)
a. 10 hours
b. 12 hours
c. 14 hours
d. 16 hours
2. A man rows to a place 48 km distant and comes back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is: (a)
a. 1 km/hr.
b. 2 km/hr.
c. 1.5 km/hr.
d. 2.5 km/hr.
3.The speed of a boat in the still water of 22 km/hr and the rate of current is 4 km/hr. The distance traveled downstream in 24 minutes is: (c)
a. 9.4 km
b. 10.2 km
c. 10.4 km
d. 9.2 km
4. A boat running downstream covers a distance of 22 km in 4 hours while for covering the same distance upstream, it takes 5 hours. What is the speed of the boat in still water? (b)
a. 5 kmph
b. 4.95 kmph
c. 4.75 kmph
d. 4.65
