Q:

A) 7 hours | B) 8 hours |

C) 12 hours | D) 14 hours |

Answer: D) 14 hours

Explanation:

Explanation:

Work done by the leak in 1 hour =

Leak will empty the tank in 14 hrs

Q:

A) 50 m^3/min | B) 60 m^3/min |

C) 72 m^3/min | D) None of these |

Answer & Explanation
Answer: A) 50 m^3/min

Explanation:

Explanation:

Let the filling capacity of the pump be x /min.

Then, emptying capacity of the pump=(x+10) /min.

so,

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Q:

A) 6 hrs | B) 20/3 hrs |

C) 7 hrs | D) 15/2 hrs |

Answer & Explanation
Answer: C) 7 hrs

Explanation:

Explanation:

Now, it is the turn of A and B (3/20) part is filled by A and B in 1 hour.

therefore, Total time taken to fill the tank =(6+1)hrs= 7 hrs

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Q:

A) 8 | B) 15 |

C) 16 | D) 18 |

Answer & Explanation
Answer: D) 18

Explanation:

Explanation:

Capacity of the tank =(12 x 13.5) liters =162 liters.

Capacity of each bucket =9 liters

Number of buckets needed = 162/9 =18.

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Q:

A) 81 min | B) 108 min |

C) 144 min | D) 192 min |

Answer & Explanation
Answer: C) 144 min

Explanation:

Explanation:

Let the slower pipe alone fill the tank in x minutes.

Then,faster pipe will fill it in x/3 minutes.

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Q:

A) 6 min.to empty | B) 6 min.to fill |

C) 9 min.to empty | D) 9 min.to fill |

Answer & Explanation
Answer: A) 6 min.to empty

Explanation:

Explanation:

Clearly,pipe B is faster than pipe A and so,the tank will be emptied.

part to be emptied = 2/5

part emptied by (A+B) in 1 minute=

so, the tank will be emptied in 6 min

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