JEE Main 2020 — Circle Question with Solution
From: JEE Main 2020 (Online) 5th September Evening Slot
Question
If the length of the chord of the circle,
x2 + y2 = r2 (r > 0) along the line, y – 2x = 3 is r,
then r2 is equal to :
x2 + y2 = r2 (r > 0) along the line, y – 2x = 3 is r,
then r2 is equal to :
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
In right CDB,
sin 60o =
CD = =
Now equation of AB is
y – 2x – 3 = 0
So =
=
r =
r2 =
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This is a previous-year question from JEE Main 2020, covering the Circle chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.