Roommates 17453

Classmates Tibor and Martin live in the same house. It takes Tibor 20 minutes to get to school, Martin only 15 minutes. In how many minutes does Martin catch up with Tibor if he leaves the house 3 minutes later than Tibor?

Correct answer:

t =  9 min

Step-by-step explanation:

s1=s2 v1 t1 = v2 t2  (t+3)/20=t/15  t=9  t=19=9  t=9=9 min



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