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Quantitative Aptitude

General Questions

1.  In one hour, a boat goes 11 km along the stream and 5 km against the stream. The speed of the boat in still water (in km/hr) is :
A. 3 km/hr
B. 5 km/hr
C. 8 km/hr
D. 9 km/hr
2.  A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively ?
A. 2 : 1
B. 3 : 2
C. 8 : 3
D. Cannot be determined
E. None of these
3. 

A man can row three-quarters of a kilometre against the stream in 11 minutes and down the stream in 7 minutes. The speed (in km/hr) of the man in still water is:
A. 2
B. 3
C. 4
D. 5
4.  A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is :
A. 8.5 km/hr
B. 9 km/hr
C. 10 km/hr
D. 12.5 km/hr
5.  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 :
A. 4
B. 5
C. 6
D. 10
6.  The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minutes is :
A. 1.2 km
B. 1.8 km
C. 2.4 km
D. 3.6 km
7.  A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is :
A. 2 : 1
B. 3 : 1
C. 3 : 2
D. 4 : 3
8.  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. 1.5 km/hr
C. 2 km/hr
D. 2.5 km/hr
9.  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. 20 hours
B. 18 hours
C. 16 hours
D. 24 hours
10.  A man can row 7 kmph in still water. If in a river running at 1.5 km an hour, it taken him 50 minutes to row to a place and back, how far off is the place ?
A. 6 km
B. 9 km
C. 3 km
D. 4 km

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