SOLUTION: Grace starts biking at 12 mph. One hour later, Dan starts biking at 15 mph, following the same route. How long will it take him to catch up with Grace?

Question 385314: Grace starts biking at 12 mph. One hour later, Dan starts biking at 15 mph, following the same route. How long will it take him to catch up with Grace?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Grace starts biking at 12 mph. One hour later, Dan starts biking at 15 mph, following the same route. How long will it take him to catch up with Grace?
...
Grace = 12 mph
Dan = 15 mph
..
hrace has traveled 12 miles when Dan starts
distance to make up =12miles
catch up speed = 15-12 = 3mph
t=d/r
t=12/3
t= 4 hours
...
m.ananth@hotmail.ca
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