61.A
man can row 6 kmph is still water. If the river is running at 1 kmph it takes
90 min to row to a place and back. How far is the place?
[A]
410
[C]
490
[B]
415
[D]
480
62.
|
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
|
|
|
|
|
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|
63.
|
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 plce and
come back, how far is the place?
|
|
·
A. 2 km
·
B. 2.4 km
·
C. 2.5 km
·
D. 3.4 km
|
64.
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. 3.6 km
65.
|
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
|
|
66.A
boat covers a certain distance downstream in 2 hours but takes 4 hours to
return upstream to the starting point. If the speed of the stream be 3 km/hr,
find the speed of the boat in still water.
[A]
11 km/hr
[C]
9 km/hr
[B]
13 km/hr
[D]
None of these
|
|
| 67.
A boat covers a certain distance downstream in 1 hour, while it comes back in
1hours. If the speed of the stream be 3 kmph, what is the speed of the boat in
still water? |
A. 12 kmph B. 13 kmph
C. 14 kmph D. 15 kmph
E. None of these
68.
|
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. 2
km
·
B. 2.6
km
·
C. 3.6
km
·
D. 4
km
|
69.In
a river flowing at 2 km/hr, a boat travels 32 km upstream and then returns
downstream to the starting point. If its speed in still water be 6 km/hr, find
the total journey time.
[A]
16 hours
[C]
14 hours
[B]
12 hours
[D]
None of these
70.The
Speed of a boat in still water is 20 kmph. If it can travel 16 km upstream in 1
hr., What time it would take to travel the same distance downstream?
[A]
20
[C]
30
[B]
40
[D]
15
