Home
Class 12
PHYSICS
A man travels one-third part of his tota...

A man travels one-third part of his total distance with speed `v_(1)` and rest two-third part with speed `v_(2)`. Find out the average speed of the man?

A

`(3v_(1)v_(2))/(v_(1)+v_(2))`

B

`(2v_(1)v_(2))/(v_(1)+ v_(2))`

C

`(3v_(1)v_(2))/(2v_(1)+v_(2))`

D

`(3v_(1)v_(2))/(v_(1)+2v_(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
`(1)/(v_(av))=1/3 ((1)/(v_(1))+(2)/(v_(2)))=((v_(2)+2v_(1))/(3v_(1)v_(2)))`
`v_(av) =(3 v_(1)v_(2))/(v_(2)+2v_(1))`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A man travels two-third part of his total distance with speed v_(1) and rest one-third part with speed v_(2) . Find out the average speed of the man?

A partical moves from A to B for the first one-third with speed v_(1) and the next two-third time with speed v_(2) . Find the average speed.

A particle travels first half of the total distance with constant speed v_1 and second half with constant speed v_2. Find the average speed during the complete journey.

If a particle travels the first half distance with speed v_(1) and second half distance with speed v_(2) . Find its average speed during journey.

A particle covers half of its total distance with speed v_(1) and the rest half distance with speed v_(2) Its average speed during the complete journey is

A man travels half time of its journey with speed of 5m/s and for remaining half time he moves half of its total distance travelled, with speed of 3 m/s and remaining half distance with speed of 6 m/s. Find out the average speed of the man?

A particle travels first half of the total time with speed v_1 and second half time with speed v_2. Find the average speed during the complete journey.

ALLEN-TEST PAPER 4-PHYSICS
  1. Differentiation of cos (sqrt(x)) with respect to x is

    Text Solution

    |

  2. Given a function y=x^(2)-2sqrt(x). What is rate of change in y with re...

    Text Solution

    |

  3. If y=(x^(2))/((x+1))"then"(dy)/(dx)"is":-

    Text Solution

    |

  4. If y=log (e) x+sin x+e^(x) then (dy)/(dx) is:

    Text Solution

    |

  5. If y=x^(3)cosx" then "(dy)/(dx)=……………………

    Text Solution

    |

  6. If the velocity of a paraticle moving along x-axis is given as v=(4t^(...

    Text Solution

    |

  7. The value of int(0)^(2) 3x^(2)dx+int(0)^(pi//2) sin x dx is :-

    Text Solution

    |

  8. The value of integral underset(2)overset(4)int(dx)/(x) is :-

    Text Solution

    |

  9. Area bounded by curve y=sinx, whit x-axis, when x varies from 0 to (pi...

    Text Solution

    |

  10. If velocity of a particle is given by v= (2t+3) m//s then average velo...

    Text Solution

    |

  11. Angle of elevation of top of building is 30^(@) from place A and beco...

    Text Solution

    |

  12. If Electric-current 'i' time (t) graph shown in figure. The average cu...

    Text Solution

    |

  13. A man travels one-third part of his total distance with speed v(1) and...

    Text Solution

    |

  14. The position 'x' of a particle moving along x-axis at any instant t re...

    Text Solution

    |

  15. The position of particle 'x' with respect to time at any instant 't' a...

    Text Solution

    |

  16. For an object starting from rest with uniform acceleration which of th...

    Text Solution

    |

  17. The slope of the tangent to the curve y=ln(cosx)" at "x=(3pi)/(4)" i...

    Text Solution

    |

  18. A particle moves along the x-axis such that its co-ordinate (x) varies...

    Text Solution

    |

  19. If y= sin x+cos x then (d^(2)y)/(dx^(2)) is :-

    Text Solution

    |

  20. If velocity v varies with time t as v=2t^(2), then the plot between v ...

    Text Solution

    |