00:01
So, in this question we are given mp lc is equal to root 13 by 2 root lc and mp lf is equal to root 10 by 2 root lf.
00:20
Given lf plus lc is equal to 18 units and lc is equal to 18 minus lf or lf is equal to 18 minus lc.
00:35
We can use this to find out lc.
00:38
Now, here for the given condition we can write pc into mp lc is equal to pf into mp lf.
00:49
So, substituting that pc into under root 13 by 2 root lc is equal to pf into under root 10 by 2 root lf.
01:03
So, squaring on both the sides we get pf square into 13 by 4 lc is equal to pc square pf square into 10 by 4 lf.
01:24
So, 13 pc square into 4 lf is equal to 10 pf square into 4 lc.
01:36
So, 13 into pc square into lf is equal to 10 into pf square into lc we can write as 18 minus lf.
01:46
So, let us write 18 minus lf.
01:49
So, that will be lf is equal to 180 pf square by 13 pc square plus 10 pf square...