Q:

A) 10 | B) 12 |

C) 14 | D) 16 |

Answer: C) 14

Explanation:

Explanation:

Part filled in 2 hours = 2/6=1/3

Remaining part =$\left(1-\frac{1}{3}\right)=\frac{2}{3}$

(A + B)'s 7 hour's work = 2/3

(A + B)'s 1 hour's work = 2/21

C's 1 hour's work = { (A + B + C)'s 1 hour's work } - { (A + B)'s 1 hour's work }

=1/6-2/21 = 1/14

C alone can fill the tank in 14 hours.

Q:

A) 16hours | B) 9hours |

C) 10hours | D) 15hours |

0
454

2
380

0
332

Q:

A) 1 hour | B) 1 hour 15 minutes |

C) 1 hour 25 minutes | D) 1 hour 30 minutes |

1
435

Q:

A) 1 hour | B) 45 minutes |

C) 30 minutes | D) 50 minutes |

0
424

Q:

A) 2h 30 min | B) 2h |

C) 3h | D) 2h 40 min |

2
550

0
444

Q:

A) 1 hour | B) 1 hour 30 min |

C) 1 hour 20 min | D) 1 hour 15 min |

3
573