Sample Materials of SSC CGL (Tier -2) Study Kit

Subject: Numerical Aptitude

Topic: Boats And Streams

1. Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:

(a) 22 hours
(b) 27 hours
(c) 20 hours
(d) 24 hours

2. The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downsteam in 12 minutes is:

(a) 3.3 km
(b) 2.9 km
(c) 2.4 km
(d) 3.6 km

3. A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?

(a) 2.4 km
(b) 2.5 km
(c) 3 km
(d) 3.1 km

4. 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?

(a) 162 km
(b) 180 km
(c) 223 km
(d) 220 km

5. A man can row kmph in still water and finds that it takes him thrice as much time to row up than as to row down the same distance in the river. The speed of the current is:

(a)7/3km/hr
(b) 37/9 km/hr
(c)14/3 km/hr
(d) 9/2 km/hr

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