Trams

Tram no. 3,7,10,11 rode together from the depot at 5am. Tram No. 3 returns after 2 hours, tram No. 7 an hour and half, no. 10 in 45 minutes and no. 11 in 30 minutes. For how many minutes and when these trams meet again?

Result

m =  360 min
h = 11:00 hh:mm Wrong answer

Solution:

120=2335 90=2325 45=325 30=235 LCM(120,90,45,30)=23325=360 m=360 min
h=5+m/60=11=11:00 hh:mm



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