Question
Train A takes 24 seconds to cross a pole and 20sec to
cross a man walking at the speed of 5.6 meter per second towards it. Train B travels 1 meter per second slower than train A and takes 25%. Less time than train need to cross a pole. If the speed of train B had been 7 meter per second less than the time taken by it to cross 114-meter-long platform is ‘5a’. Find the value of ‘a’.Solution
Let the speed of the train A = y m/s Then the length of train ‘A’= 24*y = 24y mt. Relative speed of train A wrt man = (y+5.6) m/s Also length of the train A = (y+5.6)*20 = (20y+112) mt. So, 24y = 20y+112 Y=28 Speed of train A is 28 m/s. Speed of train B = 28-1 = 27m/s. Time taken by Train ‘B’ to cross pole = 24*0.75 = 18 sec So length of train ‘B’ = 18*27 =486mt. New speed of train ‘B’ = 27-7 = 20m/s Required time taken ‘B’ = (486+114)/20 = 30 seconds 5a=30sec a=6
If + means −, − means ×, × means ÷, and ÷ means +, what will be the value of the following expression?
3 ÷ 6 + 3 – 4 × 4 = ?
...If ‘REALISE’ is coded as ‘9’, ‘PAMPHLET’ is coded as ‘8’, then what is the code for ‘PROPOSE’ in the same code language?
...A statement is given, followed by two assumptions numbered (I) and (II). Decide which of the given assumptions is valid.
Statement: Since the CEO...
Select the option that is related to third number cluster in the same way second number cluster is related to first number cluster.
18: 162 :: 44: ?
If A+B means ‘A is the daughter of B’, A-B means ‘A is the wife of B’, A×B means ‘A is the father of B’, A÷B means ‘A is the son of B’...
Two statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance...
How many persons who eat cake and momos but not pastry?
In the question, assuming the given statements to be true, find which of the conclusion (s) among given two conclusions is/are definitely true and then...
How is P related to M in ‘L # M @ N & O $ P’?
A group of alphabets are given with each being assigned a number. These have to be unscrambled into a meaningful word and correct the order of letters m...
