16 .
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is

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

C. | 10 days | D. | 16 days |

17 .
A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days. How long will C take to do it?

A. | 18 days | B. | 20 days |

C. | 24 days | D. | 30 days |

18 .
A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:

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

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

19 .
A can do a piece of work in 10 days. He works at it for 4 days and then B finishes it in 9 days. In how many days can A and B together finish the work?

A. | 6 days | B. | 8 days |

C. | 8 ½ days | D. | 7 ½ days |

20 .
A can do a piece of work in 40 days; B can do the same in 30 days. A started alone but left the work after 10 days, then B worked at it for 10 days. C finished the remaining work in 10 days. C alone c

A. | 24 days | B. | 30 days |

C. | 44 days | D. | 17 1/2 days |

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