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There is only one rail track between stations A and B on a railway line. One hour after the northbound superfast train N leaves station A for station B, the southbound passenger train S reaches station A from station B. The speed of superfast train is twice that of express train E, while the speed of passenger train S is half of that of train E. On some one day train N leaves from station A to station B 20 minutes late than its usual schedule. Both Train N and Train S have increased their speed to maintain the schedule as per the table. If the superfast train doubles its speed, then what should be the ratio (approximately) of the speed of the passenger train to the speed of the superfast train so that the passenger train reaches the station on that day at the exact scheduled time.
A relational schema for a train reservation database is given below Passenger (pid, pname, age) Re servation (pid, cass, tid) Table : Passenger pid ‘pname Age 0 ‘Sachin’ 65 1 ‘Rahul’ 66 2 ‘Sourav’ 67 3 ‘Anil’ 69   Table : Reservation pid class tid 0 ‘AC’ 8200 1 ‘AC’ 8201 2 ‘SC’ 8201 5 ‘AC’ 8203 1 'SC' 8204 3 'AC' 8202 What pids are returned by the following SQL query for the above instance of the tables? SELECT pid FROM Reservation WHERE class 'AC ' AND                EXISTS (SELECT *                            FROM Passenger                             WHERE age > 65 AND                              Passenger.pid = Reservation.pid)
A goods train and a passenger train are running in same distance with a speed in the ratio of 7 : 9. The driver of the goods train observed that the passenger train coming from backward difference and crossed his train completely in 80 sec whereas a passenger on the passenger train observed that he crossed the goods train in 55 sec; Find the ratio of their length?
An aircraft is flying at cruise level with a velocity of 110m/s at an altitude of 10 km and the dynamic pressure is 5.43kN/m2. Now assume the aircraft is flying is at sea level with a speed of 65m/s and the same dynamic pressure. In the above data, the velocity 65m/s refers to __________
A boy standing on the road observes a bird flying in east at an angle of 30°. After some time, he observes the same bird in the west at an angle of 60°. If the bird is flying at a constant height and distance covered by bird is 400 m, find the height at which bird is flying.
A plane flying north at 500 mph passes over a city at 12 noon. A plane flying east at the same altitude passes over the same city at 12.30 pm. The plane is flying east at 400 mph. To the nearest hundred miles, how far apart are the two planes at 2 pm ?
Determine the corrections or otherwise of the following assertion and reason : Assertion : Flying boats have higher values of empty weight fraction than that of the military aircraft. Reason: Military aircraft has to be lighter in weight. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true
In this question, a statement is given and there are two conclusions similar to that of i and ii. It is to be assumed that you have all the truth in the statement given, and then both the conclusions are to be taken concurrently and to determine which conclusions are reasonable without any reasonable conclusions from the information given in the statement.   Statement: Every Saturday is a holiday. Today is the holiday. Conclusion: i) Today is Saturday. ii) Today is not Saturday. Choose the correct one from the next options A) Only conclusions ii is true. B) Only conclusions i is true. C) Either i or ii is true. D) None of the i or ii is true. E) i and ii are both true.
Autopilot system is used to control the __________ of an aircraft.
Studies of fatal automobile accidents reveal that , in the majority of cases in which one occupant of an automobile is killed another survives, it is the passenger , not the driver , who is killed. It is ironic that the innocent passenger should suffer for the driver's carelessness, while the driver often suffers only minor injuries or none at all. Which of the following is an assumption underlying the reasoning in the passage above?