madrussian18
New member
- Joined
- Jul 13, 2011
- Messages
- 2
Hi there! My name is Olga, and this is my first time using a resource like this, so here goes:
The question I have to solve is as follows:
"Flying to Kampala with a tailwind a plane averaged 158 km/h. On the return trip the plane only
averaged 112 km/h while flying back into the same wind. Find the speed of the wind and the speed of
the plane in still air."
I have figured out the following, but don't know where to go next since I don't have a time or distance to work with:
D= RT
P (plane speed)
W (wind speed)
P + W = 158 mph
P - W = 112 mph
I tried using 1hr as the time, but then all I get is 158 = 112, which makes no sense. I also tried combining the speeds and making an equation such as 170 = (p+w) (p-w), but I don't think that's right, and I don't remember how to factor either...it's been a long time since I've done algebra...preping for the GMAT now and I need all the help I can get...
thanks guy/gal volunteers working on this site!!
~O
The question I have to solve is as follows:
"Flying to Kampala with a tailwind a plane averaged 158 km/h. On the return trip the plane only
averaged 112 km/h while flying back into the same wind. Find the speed of the wind and the speed of
the plane in still air."
I have figured out the following, but don't know where to go next since I don't have a time or distance to work with:
D= RT
P (plane speed)
W (wind speed)
P + W = 158 mph
P - W = 112 mph
I tried using 1hr as the time, but then all I get is 158 = 112, which makes no sense. I also tried combining the speeds and making an equation such as 170 = (p+w) (p-w), but I don't think that's right, and I don't remember how to factor either...it's been a long time since I've done algebra...preping for the GMAT now and I need all the help I can get...
thanks guy/gal volunteers working on this site!!
~O