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
2x = 270
x = 135
then 135 + y = 158
y = 23
speed of wind is 23 mph, speed of plane in still air = 135 mph