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The Northern Railways has installed an automatic train washing plant at Hazrat Nizamuddin station in Delhi. The washing system has a capacity of 250 coaches per day and takes 7-8 minutes to wash a 24-coach rake, thus saving water used for cleaning. Which of the following could be the cause of the statement? I: The automatic system will use 6000 liters of which 4000 liters will be recycled water, thus saves water used for cleaning. II: It would be eco-friendly as it uses the minimum quantity of water, soap, and disinfectants. III: As per the calculations, one depot will save 1,24,000 liters of water per day and 453 lakh liters per year after the plant is operational.
From the 50 liters of milk, 5 liters of milk is taken out and after it 5 liters of water is added to the rest amount of milk. Again 5 liters of milk and water is drawn out and it was replaced by 5 liters of water. If this process is continued similarly for the third time, the amount of milk left after the third replacement:
The World's largest bio-fuel plant has been established with a production capacity of 100 million liters per year, is located in
Two pipes feed a water tank at the rate of 2 liters/minute and and 3 liters/minute. A third pipe draws out water at a rate of 6 liters/minute. The capacity of the tank is 100 liters and it is full of water. How many minutes would it take to make the tank empty if the three pipes are opened simultaneously?
A solid-oxide fuel cell is fed with carbon monoxide and reacts with air to produce CO2. This reaction will produce 2 electrons which are used to power an electric circuit external to the fuel cell. The reaction equation is shown below: 2CO(g) + O2(g) -> 2CO2(g) ΔHr° = -565.96 kJ/mol This reaction does not occur for other types of fuel cells which use a catalyst, such as polymerelectrolyte membrane or phosphoric-acid fuel cells. The presence of carbon monoxide on the anode side of these types of fuel cells will cause catalyst poisoning, reducing the efficiency and voltage of the fuel cell. Determine the rate of enthalpy change for a carbon dioxide production rate of 208 mol/hr. The extent of the reaction occurring in the fuel cell can be obtained by the following equation: where:
Study the given bar graph and answer the question that follows. A tea plantation company produces three varieties of tea-black tea, green tea, and herbal tea. The production of three varieties (in million tonnes) over a period of six years from 2014 to 2019, has been shown in the bar graph here. The X-axis represents the years and the Y-axis displays the production of the three varieties in million tonnes. The average production of black tea in 2014, 2015, and 2018 is how much more or less (in million tomes) than the average production of green tea in 2016, 2017, and 2019?
Two pipes are connected to tank 1 and one pipe connects tank 1 and tank 2 at the bottom of both tanks. At first pipe A and pipe B will filling tank 1 and then pipe C would be opened to fill tank 2. Capacity of tank 1 is twice capacity of tank 2. Pipe C takes 8 minutes to fill the whole tank 2 wherein discharging capacity of pipe C is 62.5 liters per minute. Ratio of time taken by pipe A and B to fill the tank when operating alone is 4 : 5 then find approximate discharging capacity of pipe A and B in liters/ minute if both the pipes discharge equal amount of water in tank. Time taken by pipe A and B to fill the tank 1 is 20/ 3 minutes
A drink vendor has 80 liters of Mazza, 144 liters of Pepsi, and 368 liters of Sprite. He wants to pack them in cans, so that each can contains the same number of liters of a drink, and doesn't want to mix any two drinks in a can. What is the least number of cans required?
A drink vendor has 368 liters of Maaza, 80 liters of Pepsi and 144 liters of Sprite. He wants to pack them in cans, so that each can contains the same number of liters of a drink, and doesn't want to mix any two drinks in a can. What is the least number of cans required ?
Four different barrels contain different quantities of oil whose measurements are 310 liters, 425 liters, 275 liters and 135 liters. What will be the biggest measure used to measure all the different quantities exactly?