26 .
A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take t

A. | 18 days | B. | 24 days |

C. | 30 days | D. | 36 days |

27 .
A works twice as fast as B. If B can complete a work in 12 days independently, the number of days in which A and B can together finish the work in :

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

C. | 8 days | D. | 18 days |

28 .
Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?

A. | 17 1/7 days | B. | 27 1/7 days |

C. | 23 2/7 days | D. | 16 4/11 days |

29 .
Anil can do a work in 15 days while Sunil can do it in 25 days. How long will they take if both work together?

A. | 3 4/9 days | B. | 8 4/9 days |

C. | 9 3/8 days | D. | 6 3/8 days |

30 .
A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days. The remaining work was done by A in

A. | 3 days | B. | 5 days |

C. | 8 days | D. | 10 days |

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