Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Parabola, Ellipse and Hyperbola Parabola
What is the length of the latus rectum of the curve \(\rm x = \frac{y^2}{21}\) ?
1
84 units
2
21 units
3
\(\sqrt{21}\) units
4
More than one of the above
5
None of the above