00:02
So the reactants per unit length of the transmission line is given by the following formula.
00:08
X is equal to 2 pi times 10 to the negative 7th power times l over the natural log of d over r.
00:19
So we were given l, which is 50 ,000 meters.
00:26
We were given x, which is 3 .1, sorry, 31 .4.
00:35
We're also giving the diameter and the frequency.
00:41
So we need to rearrange the formula to solve for d, because that's what we're trying to figure out here.
00:47
So we have this formula.
00:50
We're going to plug in what we know.
00:51
X equals 2 pi times 10 to the negative 7th times 50 ,000 over the natural log of d over r.
01:02
So we're trying to solve for d...