Correct Answer - Option 4 : 24 units
Concept:
Parabola, y2 = 4ax, where a > 0, then
Length of latus rectum = 4a
Parabola, y2 = - 4ax, where a > 0, then
Length of latus rectum = 4a
Calculation:
Given parabolic equation , y2 = - 24x
On comparing with standard equation , a = 6
We know that , length of latus rectum = 4a
Latus rectum = 4a
⇒ Latus rectum = 4 × 6
⇒ Latus rectum = 24 units.
The correct option is 4.