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একটি পানিপূর্ণ কুয়ার গভীরতা 20m ও ব্যাস 2 m. কুয়াটিকে পানি শূণ্য করার জন্য 5 HP এর একটি পাম্প লাগানো হল। অর্ধেক পানি তোলার পর পাম্পটি নষ্ট হয়ে গেল। বাকি পানি তোলার জন্য একই ক্ষমতা সম্পন্ন আর একটি পাম্প লাগানো হল। প্রথম পাম্প দ্বারা সম্পাদিত কাজের পরিমান নির্ণয় কর।(The depth and diameter of a water filled well are 20 m and 2 m respectively. An engine of 5 HP is attached to pump out the water. The pump was ruined after emptying half of the water. Then another pump of same capacity was attached to pump out rest of the water. Determine the work done by first pump.) 
A, B and C are three small pumps fitted to a tank. D is a large pump fitted to the tank. Pump B is 25% more efficient than A. Pump C is 20% more efficient than B. Pump D is 4/3rd efficient of pump C. All of the pumps are used to fill the tank. What is the ratio of the time taken by pumps A and B to fill the tank together to the time taken by the pumps B and D to fill the tank together?
Working alone, pump A can empty a pool in 3 hours. Working alone, pump B can empty the same pool in 2 hours. Working together, how many minutes will it take pump A and pump B to empty the pool?
A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump
In the question below are given two statements followed by two conclusions numbered I and II. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: I. Only a few generator is pump II. Some pump is gasoline Conclusions: I. Some pump is not gasoline II. Some generator is not pump
If the gear ratio for fuel pump is thrice that of the oxidizer pump, the shaft speed of fuel pump is ____________ the oxidizer pump.
A boat has a crack in its bull which is leaking water into the boat and could pump which can pump the water out in 8 hours . If the boat is 168 km away from the shore and the pump is running what is the minimum speed the boat should run at so that it can reach the shore before sinking?
Consider the given statement to be true and decide which of the following assumptions is/are implicit. Statement: "Use of cell phones is not allowed in the petrol pump"- A notice in a petrol pump. Assumptions: I. All those who have cell phones will avoid talking on the phone at the petrol pump. II. People may object to such a directive as it restricts their freedom.
A motor is used to fill and empty the cooler tank. The tank has a capacity of 3360 m3. The emptying capacity of the pump is 20 m3/minute more than its filling capacity and the pump needs 14 minutes lesser to empty the tank than it needs to fill it. What is the filler capacity of the pump?
The following questions have three statements. Study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. Two pumps P and Q are working to fill a tank of capacity 2400 litres. What fraction of the water in the full tank came from pump P? Statement I: Pump Q can fill the tank in 120 hours. Statement II: Pumps P and Q together takes 48 hours to fill the tank. Statement III: Pump P can fill the tank at the rate of 30 litres per hour.