SOLUTION: A train travels at a certain average speed for a distance of 63 km. Thereafter it travels a distance of 72 km with an average speed of 6 km/hr more than the original speed. Total t
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Question 886566: A train travels at a certain average speed for a distance of 63 km. Thereafter it travels a distance of 72 km with an average speed of 6 km/hr more than the original speed. Total time taken to complete the journey is 3 hours. What is the original average speed of the train ?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
r = original speed for first 63 km.
________________rate_________time_______distance
First___________r____________(___)______63
Last____________r+6_________(___)_______72
TOTAL_________________________3
Basic Rule in Uniform Rates Travel, RT=D.
Use to find T=D/R.
________________rate_________time_______distance
First___________r___________________63
Last____________r+6________________72
TOTAL_________________________3
Solve this equation for r:
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