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An observer on ground sees a boat cross ...

An observer on ground sees a boat cross a river of width 800 m perpendicular to its stream in 200 seconds. He also finds a man on a raft floating at speed of 3 m/s with river. The distance travelled by boat as seen by man on the raft in crossing the river is -

A

800 m

B

1000 m

C

1200 m

D

1600 m

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The correct Answer is:
B
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ALLEN -KINEMATICS-2D-Exercise (O-2)
  1. A swimmer swins in still water at a speed =5 km//hr. He enters a 200m ...

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  2. A man wishes to swim across a river 40 m wide flowing with a speed of ...

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  3. An observer on ground sees a boat cross a river of width 800 m perpend...

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  4. A boatman moves his boat with a velocity 'v' (relative to water) in ri...

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  5. A ball is thrown at an angle theta up to the top of a cliff of height ...

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  6. A projectile of mass 1kg is projected with a velocity of sqrt(20)m//s ...

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  7. A particle is moving with a position vector, vec(r)=[a(0) sin (2pi t) ...

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  8. A point mass is moving in the x-y plane. Its acceleration is a constan...

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  9. A ball is thrown from ground such that it just crosses two poles of eq...

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  10. Position vector of a particle is expressed as function of time by equa...

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  11. A projectile is thrown with speed u into air from a point on the horiz...

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  12. A block is thrown with a velocity of 2m//s^(-1) (relative to ground) o...

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  13. A man on a rectilinearly moving cart, facing the direction of motion, ...

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  14. A cubical box dimension L = 5//4 m starts moving with an acceleration ...

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  15. A large rectangular box moves vertically downward with an acceleration...

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  16. In the figure there is a long horizontal bridge over a river 75 m high...

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  17. In the figure there is a long horizontal bridge over a river 75 m high...

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  18. In the figure there is a long horizontal bridge over a river 75 m high...

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  19. From the ground level, a ball is to be shot with a certain speed. Grap...

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  20. From the group level, a ball is to be shot with a certain speed. Graph...

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