SOLUTION: Nancy drove from Calgary to Vancouver at an average speed of 90 km/h. On the way back, she slowed down to enjoy the scenery, and drove at an average speed of 80 km/h. Roundtrip

Question 1064509: Nancy drove from Calgary to Vancouver at an average speed of 90 km/h. On the way back, she slowed down to enjoy the scenery, and drove at an average speed of 80 km/h. Roundtrip, she drove a total of 23 hours. What is the driving distance between Calgary and Vancouver?
Answer by josgarithmetic(39625) (Show Source): You can put this solution on YOUR website!

              SPEED        TIME      DISTANCE

GOING          90          d/90        d

RETURNING      80          d/80        d

TOTAL                      23

Sum of the time expressions,

lowest common denominator, 720.
Multiply left and right members by 720 to begin simplifying the equation.
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