For parabola $y^{2} = 84 x$ , focal distance of point $(21, 1764)$ is

64

No worries! We‘ve got your back. Try BYJU‘S free classes today!

84

No worries! We‘ve got your back. Try BYJU‘S free classes today!

24

No worries! We‘ve got your back. Try BYJU‘S free classes today!

42

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D $42$
The focal distance of a point is the distance between that point and the directrix of parabola
The equation of directrix is $x = - 21$
Therefore the focal distance is $21 + 21 = 42$
Therefore the correct option is $D$

Suggest Corrections

Similar questions

y^{2} = 84 x

y^{2} = 12 x

4

y^{2} = 12 x

4

(x_{1}, y_{1})

y^{2} = 12 x

y^{2} = 12 x

4

Join BYJU'S Learning Program