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A person rows a boat across a river maki...

A person rows a boat across a river making an angle of `60^@` with the downstream. Find the percentage time he would have saved, and he crossed the river in the shortest possible time.

A

0.47

B

0.01547

C

0.1547

D

0.1

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-APPENDICES (REVISION EXERCISE)-MOTION IN A PLANE
  1. A river is of width 120m which flows at a speed pf 8ms^(-1). If a man ...

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  2. A boat takes 4 hrs to travel certain distance in a river in down strea...

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  3. A person rows a boat across a river making an angle of 60^@ with the d...

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  4. A boatman finds that he can save 6 s in crossing a river by the quicke...

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  5. A projectile is thrown at an angle of 30^(@) with a velocity of 10m/s....

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  6. A body projected obliquely with velocity 19.6ms^(-1) has its kinetic e...

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  7. It is possible to project a particle with a given speed in two possibl...

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  8. The range of a particle when launched at an angle of 15^(@) with the h...

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  9. A ball A is projected from the ground such that its horizontal range i...

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  10. A particle is projected from the ground with velocity u making an angl...

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  11. The maximum range of a projectile is 500m. If the particle is thrown u...

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  12. A hose pipe lying on the ground shoots a stream of water upward at an ...

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  13. From a point on the ground at a distance a from the foot of a pole, a ...

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  14. A body is projected with a velocity u at an angle of 60^(@) to the hor...

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  15. A projectile is given an initial velocity of (hati+2hatj) m//s, where ...

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  16. A body is projected with an angle theta. The maximum height reached is...

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  17. A body is projected horizontally from the top of a tower with a veloci...

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  18. A body is projected at an angle theta so that its range is maximum. If...

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  19. The trajectory of a projectile in a vertical plane is y = ax - bx^2, w...

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  20. Two particles are projected simultaneously in the same vertical plane,...

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