SOLUTION: In a race of 1 km, Abdul beats Bilal by 25 seconds, who beats Faheed by 75 seconds. If Bilal and Faheed run an 800 m race, then Bilal would beat Faheed by 300 metres. Find the time

Let A be Abdul's speed (in m/s).
Let B be Bilal's speed (in m/s).
Let F be Fahid's speed (in m/s).

Then the condition says:

 = 25   (1)   ("In a race of 1 km, Abdul beats Bilal by 25 seconds")   Try to understand why it is so.

 = 75   (2)   ("In a race of 1 km, Bilal beats Faheed by 75 seconds").

The third condition says that Bilal runs 800 m at the same time as Faheed runs 500 m.
It means that the ratio of Bilal speed to Faheed speed is :

 = .   (3)


Now, from equations (2) and (3) you can find B and F.


Then, knowing and having B, you can calculate/find A from the equation (1).


Having A, you will be able to answer the problem's question.