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A motorboat going downstream overcome a ...

A motorboat going downstream overcome a raft at a point A, `tau=60min` later it turned back and after some time passed the raft at a distance `l=6.0km` from the point A. Find the flow velocity assuming the duty of the engine to be constant.

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The correct Answer is:
`v=(1)/(2 tau )`=3 kmph
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NN GHOSH-COMPOSITION AND RESOLUTION OF VELOCITIES-Exercise
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  2. To a man walking at 5kmph rain appears to fall vertically, and when he...

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  5. A man walking on a road with a velocity of 5 km per hour encounters ra...

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  6. If the resultant of two forces of magnitudes p and 2p is perpendicular...

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  7. Two cars are moving in the same direction with the same speed 30 km//h...

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  8. A man wants to cross a river 500 m wide. His rowing speed in still wat...

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  9. Find the speed of two objects if ,when they move uniformly towards eac...

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  10. The resultant of two forces of magnitude 5 N and 3 N trisects the angl...

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  11. Two bodies were thrown simultaneously from the same point, one, straig...

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  12. Two particles, 1 and 2, move with constant velocities v1 and v2 along ...

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  13. An aeroplane has to go from a point O to another point A, at distance ...

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  14. Two boats A and B moved away from a boy anchored in the middle of a ri...

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  15. A boat moves relative to water with a velocity which is n=2.0 times le...

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  16. A car window pane of length 25 cm is hinged at the top and 5 cm of its...

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  17. On a two lane road , car (A) is travelling with a speed of 36 km h^(-...

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