00:01
So we don't know how fast what the rate of the piper is or the plane, rate of the plane.
00:06
And we also don't know what the rate of the wind is.
00:13
But we know that distance, if we're going consistently, distance is equal to rate times time.
00:22
And this is the overall rate.
00:24
And so if we're going with the wind, we know that it takes the plane three hours.
00:34
And the rate that the plane would be flying would be r plus w.
00:39
So there's our time times the rate, and that will equal a particular distance.
00:46
And it said 600 miles.
00:48
And when we go against the wind, our rate of the plane is getting slowed down by the wind.
00:58
So r minus w is our rate.
01:00
But it's taking four hours to travel that same distance.
01:06
So rate times time is equal to distance, rate times time is equal to distance.
01:12
And then we just need to solve that little system...