SOLUTION: mandy begins bicycling west at 30 miles per hour at 11:00 a.m. if liz leaves from the same point 20 minutes later bicycling west at 36 miles per hour, when will she catch mandy

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: mandy begins bicycling west at 30 miles per hour at 11:00 a.m. if liz leaves from the same point 20 minutes later bicycling west at 36 miles per hour, when will she catch mandy      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 694365:
mandy begins bicycling west at 30 miles per hour at 11:00 a.m. if liz leaves from the same point 20 minutes later bicycling west at 36 miles per hour, when will she catch mandy?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
D=RT
MANDY=30T
LIZ=36(T-1/3)
THE DISTANCES ARE EQUAL.
30T=36(T-1/3)
30T=36T+36(-1/3)
30T=36T-12
30T-36T=-12
-6T=-12
T=-12/-6
T=2 HOUR THEY WILL MEET.
PROOF:
30*2=36(2-1/3)
60=36(1 2/3)
60=36*5/3
60=180/3
60=60