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At a point on a horizontal line through the base of a monument the angle of elevation of the top of the monument of the top of the monument is found to be such that its tangent is `(1)/(5)` . On walking 138 metres towards the monument the secant of the angle of elevation is found to be `(sqrt(193))/(12)` .The height of the monument (in metre ) is

A

35

B

49

C

42

D

56

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The correct Answer is:
C
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LUCENT PUBLICATION-HEIGHT AND DISTANCE-EXERCISE-12A
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