james and hannah both run 4km race.hannahtruns 1km faster than musa and finished a quater kilometer ah head of him.how long did james run in 4km?
plz help
I guess you mean km/hour
Musa ran for Tm hours at speed Vm
James ran at speed (Vm+1)
Both ran for time t
4 = (Vm+1) t = Vm t + t
3.75 = Vm t
so
4 = 3.75 + t
t = .25 hr = 15 minutes