Home
Class 14
MATHS
The efficiency of A is thrice as that of...

The efficiency of A is thrice as that of B and efficiency of B is twice as that of C. If B alone can finish a work in 15 days, in how many days A and C together will complete that work?

A

`6 1/2`

B

`4 1/3`

C

`4 2/7`

D

`7 4/5`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • TIME & WORK

    MOTHERS|Exercise MULTIPLE CHOICE QUESTIONS|175 Videos
  • TIMES & DISTANCE

    MOTHERS|Exercise CLASS ROOM EXERCISE |190 Videos
MOTHERS-TIME AND WORK -MULTIPLE CHOICE QUESTIONS
  1. A pipe can fill a tank in 32 minutes. Due to a leak the tank is filled...

    Text Solution

    |

  2. Three pipes X, Y and Z discharge three different chemicals A,B and C i...

    Text Solution

    |

  3. The efficiency of A is thrice as that of B and efficiency of B is twic...

    Text Solution

    |

  4. Two pipes A and B can fill a tank 45 minutes. If pipe A can fill an em...

    Text Solution

    |

  5. Three painters have to spend 6 hours a day for 12 days to finish a wor...

    Text Solution

    |

  6. A pipe can fill a tank in 30 minutes. Due to two leakages A and B, the...

    Text Solution

    |

  7. A and B can finish a work together in 3 2/3 days. C and D can finish t...

    Text Solution

    |

  8. A can do 1/5 th of a work in 4 days and B can do 1/6th of the same wor...

    Text Solution

    |

  9. Two pipes A and B can fill a tank in 20 minutes and 30 minutes respect...

    Text Solution

    |

  10. Three pipes A, B and C can fill a cistern in 15, 24 and 36 minutes res...

    Text Solution

    |

  11. A and B can complete a task in 25 days. B alone can complete 33 1/3% o...

    Text Solution

    |

  12. If 30 persons take 10 days to complete a certain work working 8 hours ...

    Text Solution

    |

  13. A , B and C can finish a task in 42 days, 84 days and 28 days, respect...

    Text Solution

    |

  14. A and B. working together, can complete a work in 16 days, C and A tog...

    Text Solution

    |

  15. Pipes A and B can fill a tank in 8 hours and 12 hours, respectively wh...

    Text Solution

    |

  16. A and B together can do a piece of work in 10 days, B and C together c...

    Text Solution

    |

  17. 18 men can complete a work in 9 days. After they have worked for 5 day...

    Text Solution

    |

  18. A can do 40% of a work in 6 days and B can do 30% of the same work in ...

    Text Solution

    |

  19. A, B and c can complete a piece of work in 10, 20 and 60 days respecti...

    Text Solution

    |

  20. A, B and C can complete a piece of worik in 4, 28 and 56 days respecti...

    Text Solution

    |