নল ও চৌবাচ্চা (Pipes and Cistern)

Question 1: A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank what time ?

4 1/3 hrs

7 hrs

8 hrs

14 hrs

Source: Agrani bank Ltd - Senior Officer Morning (Cancelled) - 19.05.2017

Answer: 14 hrs

Explanation:

Question 2: A tap can fill a tank in 6hours.After half hour the tank filled ,three more similar taps are opened.What is the total time taken to fill the tank completely?

3hrs 15min

3hrs 45 min

4hrs

4hrs 15min

Source: পল্লী কর্ম সহায়ক ফাউন্ডেশনের অ্যাসিসট্যান্ট ম্যানেজার-০৭.০৩.২০১৪

Answer: 4hrs

Explanation:

Question 3: A water tank has two taps (Tap-1 and Tap-2) . Tap -1 can fill a tank in 8 hours and Tap-2 can empty the tank in 16 hours . How long will they take to fill the tank if both taps are opened simultaneously but Tap-2 is closed after 8 hours ?

Source: Three Combined Bank Recruitment - Senior Officer 03 .08.2018

Answer: 12

Explanation:

Question 4: A water tank with 64-gallon capacity is filled by pipe A and emptied by pipe B. If the rate of water flow through pipe A is 2 gallons per hour, how many gallons per hour should flow through pipe B so that when both pipes are open, the initially empty tank shold be full in exactly 96 hours?

3/8

4/3

44960

8/3

Source: Mercantile Bank Ltd - Management Trainee Officer - 31.07.2015

Answer: 4/3

Explanation:

Question 5: একটি নল ১২ মিনিটে একটি খালি চৌবাচ্চা পূর্ণ করে। অপর এক নল প্রতি মিনিটে ১৪ লিটার পানি বের করে দেয়। চৌবাচ্চাটি খালি থাকা অবস্থায় নল দুটি খুলে দিলে ৯৬ মিনিটে উহা পূর্ণ হয়। চৌবাচ্চাটিতে কত লিটার পানি ধরে?

১৪৫ লিটার

১৫৫ লিটার

২০৮ লিটার

১৯২ লিটার

Source: প্রতিরক্ষা মন্ত্রণালয়ের নিয়োগ পরিক্ষা-২০১৮ - সহকারী পরিচালক - ০২.০২.২০১৮

Answer: ১৯২ লিটার

Explanation:

Question 6: 12 buckets of water fill a tank when the capacity of each tank is 13.5 liters. How many buckets will be needed to fill the same tank ,the capacity of each buckets is 9 liters?

Source: সিনিয়র অফিসার ১৫. ১১.২০১৯

Answer: 18

Explanation:

Question 7: A pipe fills a tank in P minuties and another pipe fills the tank in Q minutes. A different pipe makes the tank empty in R minutes. If all these three pipe are opened then in how many minutes the tank will be full?

p+q-qpqr

pq+pr-pqpqr

pq+qr-prpqr

pqrqr+pr-pq

Source: বাংলাদেশ সেতু কর্তৃপক্ষ (সহকারী সাব-ইঞ্জিনিয়ার) 18-12-2020

Answer: pqrqr+pr-pq

Explanation:

Question 8: If 10 ships require 10 tanks of oil in 10 days. How long is 1 tank of oil enough for a ship?

1 day

5 days

10 days

25 days

Source: Rajshahi Krishi Unnayan Bank - Officer - 22.04.2011

Answer: 10 days

Explanation:

Question 9: If Farhan were to add 5 gallons of kerosine to a tank that is already 3/4 full of kerosine , the tank would be 7/8 full. How many gallons of kerosine would the tank hold if it were full ?

25 gallons

40 gallons

64 gallons

80 gallons

Source: Exim Bank Ltd - Assistant Officer - 01.10.2010

Answer: 40 gallons

Explanation:

Question 10: A tank has two leakages. The first leakage alone can empty the tank in 9 min and the second alone would have done it in 6 min. If water leaks out at a constant rate , how long does it take both the leakage together to empty the tank?

3 min

3.5 min

4 min

3.6 min

Source: এক্সিকিউটিভ অফিসার (সাধারণ) ১৮.১০.২০১৯

Answer: 3.6 min

Explanation:

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একটি চৌবাচ্চায় ৮০০০ লিটার পানি ধরে। চৌবাচ্চাটির দের্ঘ্য ২.৫৬ মিটার এবং প্রস্থ ১.২৫ মিটার হলে এর গভীরতা কত?

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Question 1: A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank what time ?

Question 2: A tap can fill a tank in 6hours.After half hour the tank filled ,three more similar taps are opened.What is the total time taken to fill the tank completely?

Question 3: A water tank has two taps (Tap-1 and Tap-2) . Tap -1 can fill a tank in 8 hours and Tap-2 can empty the tank in 16 hours . How long will they take to fill the tank if both taps are opened simultaneously but Tap-2 is closed after 8 hours ?

Question 6: 12 buckets of water fill a tank when the capacity of each tank is 13.5 liters. How many buckets will be needed to fill the same tank ,the capacity of each buckets is 9 liters?

Question 7: A pipe fills a tank in P minuties and another pipe fills the tank in Q minutes. A different pipe makes the tank empty in R minutes. If all these three pipe are opened then in how many minutes the tank will be full?

Question 8: If 10 ships require 10 tanks of oil in 10 days. How long is 1 tank of oil enough for a ship?

Question 9: If Farhan were to add 5 gallons of kerosine to a tank that is already 3/4 full of kerosine , the tank would be 7/8 full. How many gallons of kerosine would the tank hold if it were full ?

Question 10: A tank has two leakages. The first leakage alone can empty the tank in 9 min and the second alone would have done it in 6 min. If water leaks out at a constant rate , how long does it take both the leakage together to empty the tank?

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