471 .
A and B can do a work in 12 days, B and C in 15 days, C and A in 20 days. if A, B and C work together, In how many days they will complete the work?

A. | 10 Days | B. | 12 Days |

C. | 8 Days | D. | 16 Days |

472 .
A and B can do a work in 8 days. B and C can do the same work in 12 days. A , B and C together will do this work in -

A. | 6 Days | B. | 8 Days |

C. | 10 Days | D. | 5 Days |

473 .
A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days A alone can finish the remaining work?

A. | 6 Days | B. | 5 Days |

C. | 4 Days | D. | 8 Days |

474 .
A can finish a work in 24 days, B in 9 days and Dc in 12 days. B & C start the work but are forced to leave after 3 days. The remaining work done by A in-

A. | 8 Days | B. | 10 Days |

C. | 6 Days | D. | 12 Days |

475 .
A is 30% more efficient than B. a can complete a work in 23 days. If A and B work together, how much time will it take to complete the same work?

A. | 10 Days | B. | 13 Days |

C. | 12 Days | D. | 11 Days |

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