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In a company there are 252 engineers, in which the ratio of the number of electronics engineers and computer engineers is 2 ∶ 1. The ratio of the number of electronics engineers and computer engineers becomes 1 ∶ 1 after recruitment of some more computer engineers. The average age of all the engineers is now 22 years and the average age of the computer engineers is 2 years less than the average age of electronics engineers. (A) The average age (in years) of electronics engineers is 21 (B) The average age (in years) of computer engineers is 21 (C) The average age (in years) of electronics engineers is 23 (D) The average age (in years) of electronics engineers is 25 (E) The average age (in years) of computer engineers is 23 Choose the correct answer from the options given below: 
A pipe, working at full speed, can fill an empty cistern in 1 hour. However, during the first hour it worked at one-twenty-fourth of its capacity, during the second hour at one-twelfth of its capacity, during the third hour at one-eighth of its usual capacity, during the fourth hours at one-fourth of its usual capacity and during the fifth hour it was only one-half as efficient as it was supposed to be. A second pipe also displayed similar performance, but if it worked at full speed would have filled the empty cistern in 2 hours. Together with a drain pipe that drained water out of the tank a constant rate, the empty cistern could be filled in 5 hours, all the three pipe working concurrently. How many hours will it take the drain pipe to empty the filled cistern if no other pipe was functioning during the time?
In the question below are given three statements followed by four conclusions I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance from 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: Some computer are phone. No computer is charger. Some charger are typewriter. Conclusions: I. All computer are typewriter. II. All phone are charger. III. Some charger are computer. IV. Some computer are not typewriter.
Aishwarya studies either computer science or mathematics everyday. If she studies computer science on a day, then the probability that she studies mathematics the next day is 0.6. If she studies mathematics on a day, then the, probability that she studies computer science the next day is 0.4. Given that Aishwarya studies computer science on Monday, what is the probability that she studies computer science on Wednesday?
Given below are four jumbled sentences. Out of the given options pick the one that gives their correct order. A. So, in the agrarian era, you destroy your enemy’s productive capacity by burning his crops or fields. B. Now, in the information era, destroying the enemy’s productive capacity means destroying their information infrastructure. C. You battle with your enemy by destroying the enemy’s productive capacity, which will be different depending upon the foundation of economy. D. But in the industrial era, ending productive capacity meant bombing of the factories that are located in cities and main industrial areas.
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
Ahmad has containers of two different sizes. The total capacity of 16 containers of one size is x gallons,and the total capacity of 8 containers of the other size is also x gallons , and x> 0. In terms of x , what is the capacity, in gallons, of each of the larger containers?
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?
A mixture contains 20% of A with Heat Capacity 25 J/oC, 30% of B with Heat Capacity 20 J/oC, and 50% of C with Heat Capacity 10 J/oC, what is the Heat Capacity of mixture?
A mixture contains 30% of A with Heat Capacity 10 J/oC, 30% of B with Heat Capacity 20 J/oC, and 40% of C with Heat Capacity 35 J/oC, what is the Heat Capacity of mixture?