To cover a distance of 416km, A train takes 
hrs more than train B. If the speed of train A is doubled it would take 
hrs less than B. What is speed (in km/hr) of train A?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 52.
Let the time taken by train B be 'x' hrs.
Then the time taken by train A = (x + )hrs
Speed of train B = 416/x
Speed of train A = 416/(x + )
If the speed of train A is doubled:
hence, x = 16/3
Initial speed of train A
