SOLUTION: A car went 340 miles in 5 hours, travelling part of the time at 55 mph and part of the time at 75 mph. How long did the car travel at each speed?
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Question 900233: A car went 340 miles in 5 hours, travelling part of the time at 55 mph and part of the time at 75 mph. How long did the car travel at each speed?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
RT=D basic rule for uniform travel rates.
x time done at 55 mph, y time done at 75 mph.
;
RT means distance.
and again, .
Simplify the distance sum equation: .
Any method you want, solve this system:
.
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