A circle of diameter $20$ has a chord such that the perpendicular from centre is $2$ less than the chord-length. Length

Question

A circle of diameter $20$ has a chord such that the perpendicular from centre is $2$ less than the chord-length. Length of the chord is—

Accepted Answer

$16$

Answer

$12$

Answer

$14$

Answer

$18$

A circle of diameter 202020 has a chord such that the perpendicular from centre is 222 less than the chord-length. Length of the chord is—