Runners

If John has a running speed of 3.5miles per hour and Lucy has a speed of 5 miles per hour. If John starts running at 10:00 am and Lucy starts running at 10:30 am, at what time will they meet? (as soon as possible)

Result

t = 11:40 hh:mm Wrong answer

Solution:

v1=3.5 mph v2=5 mph t2=10+30/60=212=1012=10.5 h  s1=s2   v1 (t10.00)=v2 (tt2) 3.5 (t10.00)=5 (t10.5)  1.5t=17.5  t=35311.666667=11.66667=11:40 hh:mm



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