Posted by **Anonymous** on Thursday, February 28, 2013 at 9:11pm.

Flying to Kampala with a tailwind a plane average 158km/h. On the return trip the plane only averaged 112km/h while flying back into the same wind. Find the speed of the wind and the speed of the plane in still air.

- Math please help -
**Anonymous**, Thursday, February 28, 2013 at 9:44pm
Please can someone else help me?

- Math Ms. Sue please help -
**Reiny**, Thursday, February 28, 2013 at 10:32pm
speed of plane in still air --- x mph

speed of wind ------------ y mph

so going with the wind, speed = x+y

against the wind, speed = x-y

x+y = 158

x-y = 112

add them

2x = 270

x = 135

then 135 + y = 158

y = 23

speed of wind is 23 mph, speed of plane in still air = 135 mph

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