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.

1
200

0
238

0
294

Q:

A) 90 hrs | B) 86 hrs 40 min |

C) 45 hrs | D) 86 hrs 48 min |

0
240

Q:

A) 4 hrs 25 min | B) 4 hrs 15 min |

C) 4 hrs 40 min | D) 4 hrs |

0
356

0
418

0
389

Q:

A) 30 hours | B) 29 hours |

C) 28 hours | D) 31 hours |

0
428