SOLUTION: Two persons, A and B, who are 20km apart, meet after 5 hours if they walk toward each other. However if they walk in the same direction from their starting points, it takes A 15 ho

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Question 904672: Two persons, A and B, who are 20km apart, meet after 5 hours if they walk toward each other. However if they walk in the same direction from their starting points, it takes A 15 hours to overtake B. Find their walking speed.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
a*5+b*5=20
5*(a+b)=20
a+b=4
15*a-b*15=20
1,1,4
15,-15,20
a=8/3 kph , b= 4/3 kph
check
8/3+4/3=4
12/3=4
15*8/3=120/3
60/3
120/3-60/3=20