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1 . A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:
 A. 10 B. 6 C. 5 D. 4

2 . A man rows to a place 48 km distant and come 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. 1 km/hr. B. 2 km/hr C. 1.5 km/hr. D. 2.5 km/hr.

3 . A boatman goes 2 km against the current of the stream in 2 hour and goes 1 km along the current in 20 minutes. How long will it take to go 5 km in stationary water?
 A. 2 hr 30 min B. 2 hr C. 4 hr D. 1 hr 15 min

4 . The speed of a boat in still water in 22 km/hr and the rate of current is 4 km/hr. The distance travelled downstream in 24 minutes is:
 A. 9.4 km B. 10.2 km C. 10.4 km D. 9.2 km

5 . A boat covers a certain distance downstream in 1 hour, while it comes back in 11⁄2 hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?
 A. 14 kmph B. 15 kmph C. 13 kmph D. 12 kmph

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