According to the station clocks, two babies are born at the same instant, one in Howrah and other in Delhi. (a) Who is elder in the frame of 2301 up Rajdhani Experess going from Howrah to Delhi? (b) Who is elder in the frame of 2302 Dn Rajdahni Express going from Delhi to Howrah .

Two babies are born in a moving train, one in the compartment adjacent to the engine and other in the compartment adjacent to the guard. According to the train frame , the babies are born at the same instant of time. Who is elder according to the ground frame?

Two babies are born in a moving train, one in the compartment adjacent to the engine and other in the compartment adjacent to the guard. According to the train frame , the babies are born at the same instant of time. Who is elder according to the ground frame?

A Physics teacher is explaining the difference between average speed and average velocity to her students. Where average velocity = ("displacement")/("time taken") , "average speed" = ("actual distance travelled")/("time taken") She emphasises that average speed is more relevant than average velocity, because displacement from one place to other is only theoretical, being the shortest distance between two places. Average speed is the real entity that matters, taking into account the actual time taken to travel the actual distance between the two stations. Read the above passage and answer the following question : (i) Do you agree with the statement of Physics teacher ? (ii) The shortest distance between Ambala to Delhi is 200 km . A train takes 4 hrs and covers a distance of 210 km in going from Ambala to Delhi via Karnal. Another train takes 5 hrs and covers 250 km distance in going from Ambala to Delhi via Saharanpur. What is the average speed of these two trains? What would be the average velocity of a train that takes 2.5 hrs to cover 200 km distance ? (iii) What values do you learn from this discussion ?

Study the following information carefully and answer the given questions: 6 persons are celebrating their birthdays in first 6 months of a year (January- June). Rajat celebrates in the month of March. Shreya celebrate before Saroj. Only 1 person celebrates between Rajat and Suresh, who do not celebrate immediate before or immediate after Rajesh. Rajesh celebrates immediately before Rekha. Saroj celebrates neither in June nor immediately after Suresh. Read the following information carefully and answer the questions given below. Q, W, E, R, T, Y, U, I and O are nine family members. Q is the father of E. Y is the daughter in law of W. T is the husband of Y. R is married to E. U is the only son of R. I is the granddaughter of Q. O is the son in law of T. R is the sisterin-law of T. Five trains namely Rajdhani express, Duranto express, Shatabdi express, Tejas express and Gareebrath express are running from Delhi to Dehradoon in different days of the week, starting from Monday to Friday. Two trains are running between Shatabdi and Duranto. Shatabdi is going to Dehradoon before Wednesday. Tejas express is going to Dehraddon immediate after Gareebrath. Rajdhani is not running on Friday. Then who among the following train are going to Dehradoon on Wednesday?

Direction: Study the information below and answer the following question. Six people A, B, C, D, E, and F born on either 17th or 28th of March, April, and May of the same year. No two people were born on the same date. A belongs to Delhi and was born in the month having 30 days. Neither B nor D belongs to Kolkata. Two people were born between the one who belongs to Delhi and either B or D. E was born after B but not immediately. D was not born in April. C was neither born in the month having 31 days nor belongs to Kolkata. E does not belong to Mumbai. The one who belongs to Kolkata was born in the month having 31 days. The one who belongs to Mumbai was born on an even date. A and E were born in the adjacent month but on different dates. The one who belongs to Chennai and C was born on the same date but in different months. F was born immediately after B. The one who belongs to Mumbai was born immediately after the one who was born in Chennai. The one who belongs to Bengaluru was born in the month having 30 days. Two people were born between E and the one who belongs to Kolkata. One person was born in Hyderabad. How many people were born between F and the who belongs to Chennai?

Ten persons A, B, C, D, E, F, G H, I and J are going to four cities on four different dates i.e. 2nd, 4th, 7th and 9th of the month. Each person goes on different cities on different dates. Four cities are namely Ranchi, Delhi, Kota and Patna, but not necessarily in the same order. At least one person goes on each date. No person goes to Ranchi on 4th of the month. B does not go to any city on 2nd and 7th of the month. The persons, who go on 7, go to every city. I goes to Kota only with that person who goes on 7th of the month. Maximum four persons can go on the same date. Only one person goes to Delhi. J does not go on 7th of the month. C does not go to Ranchi but go with E, who goes on 9th of the month. One of the person, who goes to Kota, goes on even number date of the month, which is more than 3. B goes to Ranchi with A, but does not go with H. H goes on that city in which most of the person are going. F does not go with C and J but go with another person. J goes to Ranchi. D does not go with E. G does not go on 9th and 2nd of the month. H goes on an odd number date of the month and no any person go on that date on which H goes in that city. One of the person, who goes to Ranchi go on even number date of the month. C goes on an odd number date of the month. Who among the following person goes to Delhi ?

Ten persons A, B, C, D, E, F, G H, I and J are going to four cities on four different dates i.e. 2nd, 4th, 7th and 9th of the month. Each person goes on different cities on different dates. Four cities are namely Ranchi, Delhi, Kota and Patna, but not necessarily in the same order. At least one person goes on each date. No person goes to Ranchi on 4th of the month. B does not go to any city on 2nd and 7th of the month. The persons, who go on 7, go to every city. I goes to Kota only with that person who goes on 7th of the month. Maximum four persons can go on the same date. Only one person goes to Delhi. J does not go on 7th of the month. C does not go to Ranchi but go with E, who goes on 9th of the month. One of the person, who goes to Kota, goes on even number date of the month, which is more than 3. B goes to Ranchi with A, but does not go with H. H goes on that city in which most of the person are going. F does not go with C and J but go with another person. J goes to Ranchi. D does not go with E. G does not go on 9th and 2nd of the month. H goes on an odd number date of the month and no any person go on that date on which H goes in that city. One of the person, who goes to Ranchi go on even number date of the month. C goes on an odd number date of the month. Four of the following five are alike in a certain way based on their positions in the above arrangement and so form a group. Who among the one that does not belong to that group ?

Ten persons A, B, C, D, E, F, G H, I and J are going to four cities on four different dates i.e. 2nd, 4th, 7th and 9th of the month. Each person goes on different cities on different dates. Four cities are namely Ranchi, Delhi, Kota and Patna, but not necessarily in the same order. At least one person goes on each date. No person goes to Ranchi on 4th of the month. B does not go to any city on 2nd and 7th of the month. The persons, who go on 7, go to every city. I goes to Kota only with that person who goes on 7th of the month. Maximum four persons can go on the same date. Only one person goes to Delhi. J does not go on 7th of the month. C does not go to Ranchi but go with E, who goes on 9th of the month. One of the person, who goes to Kota, goes on even number date of the month, which is more than 3. B goes to Ranchi with A, but does not go with H. H goes on that city in which most of the person are going. F does not go with C and J but go with another person. J goes to Ranchi. D does not go with E. G does not go on 9th and 2nd of the month. H goes on an odd number date of the month and no any person go on that date on which H goes in that city. One of the person, who goes to Ranchi go on even number date of the month. C goes on an odd number date of the month. Who among the following person goes on 2^(nd) of the month ?

Ten persons A, B, C, D, E, F, G H, I and J are going to four cities on four different dates i.e. 2nd, 4th, 7th and 9th of the month. Each person goes on different cities on different dates. Four cities are namely Ranchi, Delhi, Kota and Patna, but not necessarily in the same order. At least one person goes on each date. No person goes to Ranchi on 4th of the month. B does not go to any city on 2nd and 7th of the month. The persons, who go on 7, go to every city. I goes to Kota only with that person who goes on 7th of the month. Maximum four persons can go on the same date. Only one person goes to Delhi. J does not go on 7th of the month. C does not go to Ranchi but go with E, who goes on 9th of the month. One of the person, who goes to Kota, goes on even number date of the month, which is more than 3. B goes to Ranchi with A, but does not go with H. H goes on that city in which most of the person are going. F does not go with C and J but go with another person. J goes to Ranchi. D does not go with E. G does not go on 9th and 2nd of the month. H goes on an odd number date of the month and no any person go on that date on which H goes in that city. One of the person, who goes to Ranchi go on even number date of the month. C goes on an odd number date of the month. In which of the following city most of the persons are going ?