(Sample Material) India Post Payments Bank (IPPB) Study Kit "Boats and Streams"

Sample Materials of India Post Payments Bank (IPPB) Study Kit

Subject: Numerical Ability

Topic: Boats and Streams

1. A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C midway between A and B. If the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B?

(1) 162 km
(2) 180 km
(3) 223 km
(4) 220 km
(5) None of these

2. A motorboat, whose speed is 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:

(1) 9
(2) 5
(3) 6
(4) 11
(5) None of these

3. The speed of a boat in still water is 10 km/hr. If it can travel 26 km downstream and 14 km upstream in the same time, the speed of the stream is:

(1) 5 km/hr
(2) 3.5 km/hr
(3) 3 km/hr
(4) 4 km/hr
(5) None of these

4. A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:

(1) 2 mph
(2) 4.5 mph
(3) 5 mph
(4) 4 mph
(5) None of these

5. A man rows to a place 48 km distant and 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:

(1) 1 km/hr
(2) 3 km/hr
(3) 1.8 km/hr
(4) 6 km/hr
(5) None of these

 

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