RRB Junior Engineer Stage 1 Model Papers 4

Question : 9 of 99

Marks: +1, -0

The length of the tangent drawn to a circle of radius 4cm from a point 5 cm away from the centre of the circle is

Solution:

∠OBA = 90°
OA = 5, OB = 4

∴AB=√{OA^2-OB^2}=√{25-16}=√9=3 cm

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