If the vertex of a parabola be at origin and directrix be x + 5 = 0, then its latus rectum is
A
5
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
10
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
20
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
40
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is C 20 Length of latus rectum is four times the distance of focus from directrix. Distance of vertex (0,0) from x+5 = 0 is 5 units =>latus rectum = 4a = 20.