SSC CGL Tier II 21 Sep 2014 Paper

Question : 29 of 100

Marks: +1, -0

The radius of a circle is 6 cm. The distance of a point lying outside the circle from the centre is 10 cm. The length of the tangent drawn from the outside point to the circle is

5 cm
6 cm
7 cm
8 cm

Validate

Solution:

(4)

OB = 6 cm
OA = 10 cm
∠OBA = 90°

∴ A B=√{O A^{2}-O B^{2}}

=√{10^{2}-6^{2}}=√{100-36}

=√{64}=8 {cm}

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