A glider flies 240 miles with the wind and 210 miles against the wind.What is the speed of the glider and the wind?
We have been doing systems of equations. I am not sure how to work this out and my teachers not very helpful.
Thanks for all the help.
2007-01-24 10:53:27 · 3 answers · asked by Anonymous in Education & Reference ➔ Homework Help
time=3 hours
2007-01-24 11:04:03 · update #1
Speed of glider = g
Speed of wind = w
When he flies with the wind, his his speed is 240 mph:
g + w = 240
When he flies against the wind, his speed is 210 mph:
g - w = 210
Solve the top one for g gives you g = 240 - w. Subsitute that into the second equation for g, and you get:
(240-w) - w = 210
240-2w = 210
-2w = -30
w = 15
Speed of wind is 15 mph. I'll let you use that to figure out the glider's speed.
2007-01-24 11:00:55 · answer #1 · answered by josh c 1 · 1⤊ 0⤋
You need to specify the time to calculate the speed (240 and 210 miles in how many hours).
The calculation would be quite simple:
Assume that x= speed of glider
and y=speed of wind
This would give you:
x+y=240 miles (in t for time)
x-y= 210 miles (in t for time)
This would allow you to figure out both.
2007-01-24 19:01:38 · answer #2 · answered by Twin Peak 3 · 0⤊ 0⤋
x: glider
y: wind
x + y = 240
x - y = 210
solve from there. good luck!
2007-01-24 18:59:37 · answer #3 · answered by eriq p 4 · 0⤊ 0⤋