The caravans

At 6:00 in the morning, a caravan set out of the oasis at a speed of 1.5 miles per hour. Two hours later, a second caravan followed her at 2.5 miles per hour. When did the faster caravan run slower? How far from the oasis?

Result

t2 = 11:00 hh:mm Wrong answer
s =  7.5 mil

Solution:

v1=1.5 mil/h t1=6.00 v2=2.5 mil/h T=2 h  s=s1=s2    v1 t=v2 (tT) 1.5 t=2.5 (t2)  t=5  t2=t+t1=5+6=11=11:00 hh:mm
s=v1 t=1.5 5=152=152 mil=7.5 mil



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