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A Car Averages 55 Mph For The First 4 Hours Of A Trip And Averages 70 Mph For Each Additional Hour. The Average Speed For The Entire Trip Was 60 Mph. How Many Hours Long Is The Trip? |
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Answer» Lets assume additional hours = X hrs. So TOTAL No. hours in journey = (4+x) [(55*4)+(70*x)]/(4+x)=60 => =>x=2 Therefore, Total No. of hrs. in Journey = (x+4) = 6 hrs. Lets assume additional hours = x hrs. So total No. hours in journey = (4+x) [(55*4)+(70*x)]/(4+x)=60 => =>x=2 Therefore, Total No. of hrs. in Journey = (x+4) = 6 hrs. |
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