SOLUTION: Judy walked into the country at 5 km per hour and then rode a bus back home at 30 kilometers per hour. It was a long trip as she was gone 21 hours. How far did she walk?

Question 1101746: Judy walked into the country at 5 km per hour and then rode a bus back home at 30 kilometers per hour. It was a long trip as she was gone 21 hours. How far did she walk?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the one-way distance she traveled in km
Let - her time in hrs spent walking
= her time in hrs spent riding on the bus
(1)
(2)
-----------------------------

and

----------------------
She walked for 18 hrs and
rode the bus for 3 hrs
---------------------------
check:
(1)
(1)
(1) km
and
(2)
(2)
(2)
(2)
(2) km
OK

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