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Byju's Answer
Standard XII
Physics
Escape Speed
an object is ...
Question
an object is released at one bank into a river flowing with speed 5 km/h towards east.Air is blowing with speed 5 km/h towards north .ifwidth of river is 200 m then minimum time taken by floating object to reach the other bank i
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Similar questions
Q.
Air speed of an aeroplane is
400
k
m
/
h
r
. The wind is blowing at
200
k
m
/
h
r
towards east direction. In what direction should the pilot try to fly the plane so as to move exactly towards north east
Q.
A river
5
km
wide is flowing at the rate of
2
km/hr
. The minimum time taken by a boat to cross the river with a speed
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Q.
An aircraft flies at a speed of
400
km/h
in still air. A wind is blowing with a speed of
200
√
2
km/h
from South. The pilot wishes to travel from point
A
to a point
B
, where point
B
is North-East of
A
. Find the direction he must head if
A
B
=
1000
km
.
Q.
A swimmer swims in still water at a speed
=
5
k
m
/
h
. He enters a
200
m
wide river, having river flow speed
=
4
k
m
/
h
r
at point A and proceeds to swim at an angle of
127
o
with the river flow direction. Another point B is located directly across A on the other side. The swimmer lands on the other bank at a point C, from which he walks the distance CB with a speed
=
3
k
m
/
h
r
. The total time in which he reaches from A to B is
Q.
A swimmer swims in still water at a speed
=
5
k
m
/
h
r
. He enters a
200
m
wide river, having river flow speed
=
4
k
m
/
h
r
at point A and proceeds to swim at an angle of
127
∘
with the river flow direction. Another point
B
is located directly across
A
on the other side. The swimmer lands on the other bank at a point
C
, from which he walks the distance
C
B
with a speed
=
3
k
m
/
h
r
. The total time in which he reaches from
A
to
B
is
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