51.
|
A
man can row 9 1/3 kmph in still water and finds that it takes him thrice as
uch time to row up than as to row down the same distance in the river. The
speed of the current is:
|
|
·
A. 3
1/2 km/hr
·
B. 2
1/3 km/hr
·
C. 4
1/2 km/hr
·
D. 4
2/3 km/hr
|
52.
|
A
man can row three - quarters of a kilometer against the stream in 11¼minutes.
The speed(in km/hr) of the man in still water is
|
|
A. 2
|
B. 3
|
|
|
C. 4
|
D. 5
|
|
53.
|
Speed of a boat in standing water is 9 kmph and
the speed of the stream is 1.5 kmph. A man rows to place at a distance of 105
km and comes back to the starting point. The total time taken by him is:
|
|
·
A. 12
hours
·
B. 24
hours
·
C. 36
hours
·
D. 48
hours
|
54.The
Speed of a boat in still water is 10 kmph. If it can travel downstream 20 kms
in the same time as it can travel 12 kms upstream. What is the speed of the
current?
[A]
2
[C]
5
[B]
3
[D]
2.5
55.A
man can row 6 km/hr in still water. If the river is running at 2 km/hr, it
takes 3 hours more in upstream than to go downstream for the same distance. How
far is the place?
|
[A]
24 km
[C]
36 km
[B]
28 km
[D]
None of these
56.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:
A. 2 mph B. 2.5 mph
C. 3 mph D. 4 mph
57.
|
If a
man rows at the rate of 5 kmph in still water and his rate against the
current is 3.5 kmph, then the man’s rate along the current is
|
|
A. 4.25 kmnph
|
B. 6 kmph
|
|
|
C. 6.5 kmph
|
D. 8.5 kmph
|
|
58.
|
A boat takes 19 hours for travelling downstream
fro poin 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. 180 km
·
B. 190 km
·
C. 220 km
·
D. 230 km
|
59.The
speed of a boat in still water is 8 km/hr. If it speed downstream be 15 km/hr,
then speed of the stream is:
[A]
7.5 km/hr
[C]
9 km/hr
[B]
7 km/hr
[D]
None of these
60.
|
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. 16 hours
|
B. 18 hours
|
|
|
C. 20 hours
|
D. 24 hours
|
|
