I had to baby-talk my way through it . . .
can run 1 km in 4 minutes 51 seconds and in 5 minutes.
How many meters start can A give B in a 1 km race, so that the race may end in a dead heat?
Answer: 30 meters.
runs 1000 m in 291 seconds.
runs 1000 m in 300 seconds.
His speed is: .
In 291 seconds, runs only: .
Therefore, should get a 30-meter headstart.