word problem help

700+650 = 1350, 1350/2 = 675, 11623/675 = 17.2 hours

A plane flew from location a to b at 700 km/h and returned at 650 km/h. if the distance between the two cities is 11,623 km. how long did the trip take?

Use the units to help you - see how I have cancelled out the km leaving only hours.

$11623km*\frac{1hour}{700km}\quad+\quad 11623km*\frac{1hour}{650km}\\ 11623*\frac{1hour}{700}\quad+\quad 11623*\frac{1hour}{650}\\ \frac{11623hour}{700}\quad+\quad \frac{11623hour}{650}\\$

A plane flew from location a to b at 700 km/h and returned at 650 km/h. if the distance between the two cities is 11,623 km. how long did the trip take?

11,623/700 =16.60....hours taken by the outgoing plane.

11,623/650 =17.88....hours taken by the returning plane.