SOLUTION: During the first part of a trip, Stra travels 40 miles at a certain speed. Stra travels 100 miles on the second part of the trip at a speed 3 mph slower. The total time for the tri
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Question 886437: During the first part of a trip, Stra travels 40 miles at a certain speed. Stra travels 100 miles on the second part of the trip at a speed 3 mph slower. The total time for the trip is 2 hrs. What was the speed on each part of the trip?
Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
r is the speed on the first part of the trip.
________________speed_______time_______distance
First Part_______r__________(___)_________40
Second Part_____r-3_________(___)________100
TOTAL________________________2
RT=D basic law about uniform rates of travel.
T=D/R.
________________speed_______time__________distance
First Part_________r______________________40
Second Part_______r-3_________________100
TOTAL________________________2
Solve for r in .
Solving that should pass some steps simplifying to , and general solution should be mph. The other part of the trip is mph.
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