31 .
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 can finish it in 6 days. A and C together will do it in :

A. | 4 days | B. | 6 days |

C. | 8 days | D. | 12 days |

32 .
A can do a job in 18 days and B can do it in 30 days. A and B working together will finish twice the amount of work in ------- days?

A. | 21 ½ days | B. | 22 ½ days |

C. | 23 ½ days | D. | 12 ½ days |

33 .
A can do a piece of work in 10 days and B can do it in 15 days and C can do it 20 days. They started the work together and A leaves after 2 days and B leaves after 4 days from the beginning. How long

A. | 8 2/3 days | B. | 9 2/3 days |

C. | 10 2/3 days | D. | 10 days |

34 .
A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in

A. | 24/7 days | B. | 23/8 days |

C. | 7/24 days | D. | 8/23 days |

35 .
A and B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days shall B finish the whole work alone?

A. | 30 days | B. | 40 days |

C. | 60 days | D. | 70 days |

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