Q:

A) 4 days | B) 6 days |

C) 8 days | D) 10 days |

Answer: B) 6 days

Explanation:

Explanation:

Ratio of rates of working of A and B =2:1. So, ratio of times taken =1:2

Therefore, A's 1 day's work=1/9

B's 1 day's work=1/18

(A+B)'s 1 day's work= 1/9 + 1/18 = 1/6

so, A and B together can finish the work in 6 days

Q:

A) 12 days | B) 8 days |

C) 14 days | D) 16 days |

8
1269

9
892

Q:

A) 16.5 days | B) 13 days |

C) 10 days | D) 12.5 days |

8
784

5
730

6
718

Q:

A) 112days | B) 3 days |

C) 4 days | D) 2 days |

3
968

1
778

Q:

A) 100 days | B) 120 days |

C) 72 days | D) 64 days |

5
1082