In a race of $200\,m$,$A$ can beat $B$ by $31\,m$ and $C$ by $18\,m$. In a race of $280\,m$,$C$ will beat $B$ by (in $m$):

In a race of $600\, m$,$A$ can beat $B$ by $60\, m$ and in a race of $500\, m$,$B$ can beat $C$ by $50\, m$. By how many $m$ will $A$ beat $C$ in a race of $400\, m$?

The respective ratio between the speeds of a car,a train and a bus is $5: 9: 4$. The average speed of the car,the bus and the train is $72 \text{ km/h}$ together. What is the average speed of the car and the train together? (in $\text{km/h}$)

In a $1\, km$ race, $A$ beats $B$ by $25\, m$ or $5\, s$. Find the time taken by $A$ to complete the race.

Two boys,$A$ and $B$,run at $4.5 \text{ km/h}$ and $6 \text{ km/h}$ respectively. $A$ is given a head start of $190 \text{ m}$. If the total course length is $1 \text{ km}$,by what distance (in $\text{m}$) does $B$ win?

$A$ runs $1 \frac{3}{8}$ times as fast as $B$. If $A$ gives $B$ a start of $120 \, m$ and they reach the goal at the same time,the goal is at a distance of (in $m$)