Question 334085: what is the time that A will meet B if A walks at 80km/hr and B walks 60km/he and the total distance is 210km Answer by jrfrunner(365) (Show Source):
You can put this solution on YOUR website! if they are to meet, the presumption (since not stated) is that they are walking toward each other.
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let =distance walked by A
let =distance walked by B
let =walking rate by A = 80 kmph
let =walking rate by B = 60 kmph
let t=time they meet
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you need to know the relationship: distance = rate*time: d=r*t
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given d=
d= (same t because they meet at a common time)
210=80*t+60*t=140*t
210/140=t
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t=1.5 hours
