"While walking along a tram line I noticed that a tramcar caught up with me every 12 minutes, and every 4 minutes a tramcar coming in the opposite direction passed me. Both the tram cars and I were moving at a uniform rate.What was the time interval between two tram cars leaving their terminals?"i need an answer please.. tnx ill mark BEST to anyone who can answer it.

this only because comment, iam not surely the answer 48mins.