Question

Two circles of diameters 10 cm and 6 cm have the same centre. A chord of the larger circle is a tangent of the smaller one. The length of the chord is :

Answer 1

16 is answer

BY PYTH, THOREM

(H)^2 = (P)^2 + (B)^2

==> (10)^2 = (6)^2 + (B)^2

==> 100-36 = B^2

==> 64 - b^2

==> B = 8

SO, 2B = 8*2 = 16