OpenStudy (anonymous):

A train heading north covered 240 km at 96 km/h. On the return journey heading south, the train averaged 120 km/h. How long did both trips take? A. 0.5 h B. 2.0 h C. 2.5 h D. 4.5 h

3 years ago
OpenStudy (anonymous):

Do proportions, I'll do the north trip time and you do the south trip time\[\frac{ 1hour }{ 96km/h }=\frac{ xhour }{ 240km }=>96x=240=>x=\frac{ 240 }{ 96 }=2.5hours\]

3 years ago
OpenStudy (anonymous):

Once you found the south trip time then add 2.5 hrs to it to get the TOTAL trip time

3 years ago
OpenStudy (anonymous):

would it be 4.5 hrs then

3 years ago
OpenStudy (anonymous):

Correct! :)

3 years ago
OpenStudy (anonymous):

:D thank you so much

3 years ago
OpenStudy (anonymous):

No Problem

3 years ago