AP EAMCET Engineering 2011 Solved Paper

Given equation of parabola, y2=lx ......(i)
Here, length of latusrectum =l
Since, point (

c2

8

,c) is the point of intersection of parabola and the line y=mx+c then it will satisfy the equations.
⇒ y2=lx
⇒ (c)2=

lc2

8

⇒l=8
∴ Length of latusrectum (l)=8