Home
Class 14
MATHS
A & B together can finish a certain piec...

A & B together can finish a certain piece of work in 6 days. If A reduces his efficiency by 20 % and B increases his efficiency by 30 %, then work will be finish in same time. If A work with his original efficiency and B work with 2 times of his efficiency, then in how many days working together work will be finished?

A

A)7 days

B

B)`4(4)/(7)`days

C

C)`3(2)/(7)`days

D

D)`4(2)/(7)`days

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TIME AND WORK & PIPE AND CISTERN

    ADDA247|Exercise MAINS QUESTIONS |55 Videos

  • TIME AND WORK & PIPE AND CISTERN

    ADDA247|Exercise PREVIOUS YEAR QUESTIONS |32 Videos

  • TIME AND WORK & PIPE AND CISTERN

    ADDA247|Exercise PRELIMS QUESTIONS (LEVEL - 1) |40 Videos

  • SPEED, TIME AND DISTANCE

    ADDA247|Exercise Previous Year Questions|31 Videos
ADDA247-TIME AND WORK & PIPE AND CISTERN -PRELIMS QUESTIONS (LEVEL - 2)
  1. If Hemant works for 20 days and Manoj works for 15 days then (3)/(5)th...

    Text Solution

    |

  2. Four men and four women can complete a piece of work in 5 days, while ...

    Text Solution

    |

  3. A & B together can finish a certain piece of work in 6 days. If A redu...

    Text Solution

    |

  4. Efficiency of B is 40% more than efficiency of A and efficiency of C i...

    Text Solution

    |

  5. Pipe P(1) can fill 3//5th of the tank in 9 minutes. There are two more...

    Text Solution

    |

  6. Anurag can complete a piece of work in 280 days and Rohit is 33(1)/(3)...

    Text Solution

    |

  7. If 'a' number of males can do a work in (2a-8) days while (a-8) number...

    Text Solution

    |

  8. 8 men and 10 women can do a work in 15 days while 10 men and 18 women ...

    Text Solution

    |

  9. A, B & C are three inlet pipes. Time taken by A & B together to fill h...

    Text Solution

    |

  10. A & B can complete a work in 24 days and 36 days respectively. A & B t...

    Text Solution

    |

  11. A, B & C working together can complete a work in 18 days and A & C wor...

    Text Solution

    |

  12. A working alone & B working alone can complete a piece of work in 15 d...

    Text Solution

    |

  13. Veer is 20% more efficient than Anurag and Sameer is 33(1)/(3)% less e...

    Text Solution

    |

  14. Pipe-B & D are inlet pipes and pipe-A & C are outlet pipes. Pipe-B & D...

    Text Solution

    |

  15. Manish and Suresh can do a task A in 48 days and 60 days respectively....

    Text Solution

    |

  16. P can do a work in ((1)/(4))^(th) of time in which Q alone can do and ...

    Text Solution

    |

  17. P alone and Q alone can do a piece of work in x and (3x)/(2) days resp...

    Text Solution

    |

  18. Anurag is 40% more efficient than Ayush. Ayush, Anurag and Shivam work...

    Text Solution

    |

  19. Neha who is 50% more efficient than Ritu who take double time than Pri...

    Text Solution

    |

  20. A, B and C can do a piece of work in 20 days, 10 days and 15 days resp...

    Text Solution

    |