⟩ A traveler walks a certain distance. Had he gone half a kilometer an hour faster , he would have walked it in 4/5 of the time, and had he gone half a Kilometer an hour slower, he would have walked 2 ½ hr longer. What is the distance?
there'll be 3 eq...
t - time
d - distance
s - speed
d/t=s
d/(4/5)t=s+1/2
d/(t+(5/2))=s-(1/2)
solve it....
u'll get
d=15...