Asked by toya5
A salesman drove 480 miles from Pittsburgh to Hartford. The next day he returned the same distance to Pittsburgh in half an hour less time than his original trip took, because he increased his average speed by 4 mph find his original speed.
Okay...
I did it this way...480/2= 240
240/4 = 60 original speed
60+4= 64 is the faster return speed
Please Help!!!!
Okay...
I did it this way...480/2= 240
240/4 = 60 original speed
60+4= 64 is the faster return speed
Please Help!!!!
Answers
Answered by
Steve
since time = distance/speed,
480/(x+4) = 480/x - 1/2
x = 60
Why did you divide by 2? It's 480 miles each way.
Amazingly, you got the correct answer!
480/60 = 8
480/64 = 7.5
That's like saying
16/64 = 1/4 because you can cancel the sixes!
480/(x+4) = 480/x - 1/2
x = 60
Why did you divide by 2? It's 480 miles each way.
Amazingly, you got the correct answer!
480/60 = 8
480/64 = 7.5
That's like saying
16/64 = 1/4 because you can cancel the sixes!
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