Train P starts from Lucknow to Dehradun at 11:55 am with an average speed of 30 m/s. Train Q starts from Dehradunto Lucknowat 1:35 pm with an average speed of 20 m/s. At what time the two trains will meet each other if the distance between Lucknowand Dehradunis 625 Km.
Speed of train P = 30 × 18/5 = 108 Km/h Speed of train Q = 20 × 18/5 = 72 Km/h Distance travelled by train P till 1:35 pm = 108 × 5/3 = 180 Km Relative speed of trains = 108 + 72 = 180 Km/h Remaining distance to be travelled after 1:35 pm = 625 – 180 = 445 Km Time taken to cover 445 Km = 445/180 = 5/2 = 2 hours 30 minutes So the two trains will meet each other at 1:35 + 2:30 = 4:05 pm
Seven athletes S, T, U, V, W, X and Y participate in a race. W is ahead of S but behind X. V is ahead of only two athlete. Y is running last. U is runni...
Who is the second lightest among them?
Six friends L, M, N, O, P, Q have different heights. M is taller than only Q. L and N are taller than Q but shorter than O, who is not the tallest. Whos...
Q is older than R. N and O are of equal age. S is the youngest. P is younger than O. P is older than Q. How many persons are younger than P?
Aman is 16th from the left end in a row of boys and Vivek is 18th from the right end. Gagan is 11th from Aman towards t...
How many persons are younger than P?
Five friends S, T, U, V and W having different height. U is taller than only one person. W is neither the tallest not shortest. There are two persons wh...
In a class among five students, F has more marks than G and H, but H does not have least marks. I has more marks than J and J has more marks than F, who...
Among five friends M is taller K but not Y. H is taller than Y but not A. If they stand in increasing order according to their heights then who stand at...
In a class of 10 boys and 7 girls Reshma’s rank is 8th from the front. If there are 4 boys and 2 girls between Reshma and Ram whose rank is 8th am...
