Question

The length of the latus rectum of a parabola, whose vertex and focus are on the positive x–axis at a distance R and S (>R) respectively from the origin, is :

(1) 4(S + R)

(2) 2(S – R)

(3) 4(S – R)

(4) 2(S + R)

Answer 1

Correct answer is: (3) 4(S – R)