Q:

A) 6 days | B) 8 days |

C) 11 days | D) 13 days |

Answer: A) 6 days

Explanation:

Explanation:

M = 10 days

The ratio of efficiency of M & N are 3 : 2

Hence, the time rquired for N alone = 15 days

=> Required time taken t=by both to complete the work = M x N / M + N

= 10 x 15/ 10 + 15

= 150/25

= 6 days.

Q:

A) 7 days | B) 6 days |

C) 5 days | D) 2 days |

0
12

0
33

1
22

Q:

A) 75 days | B) 37.5 days |

C) 17.5 days | D) 35 days |

0
64

0
50

Q:

A) 9 hours | B) 6 hours |

C) 12 hours | D) 18 hours |

0
53

Q:

A) 20 days | B) 5 days |

C) 25 days | D) 10 days |

3
76

0
85