The angle of elevation of the top of a h...

The angle of elevation of the top of a half constructed tower at a distance of 150 m from the base of the tower is `30^(@)`. If angle of elevation of top of tower from that point is to be `45^(@)`, then by what amount height of the tower be increased ?

59.4 m

61.4 m

62.4 m

63.4 m

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LUCENT PUBLICATION-HEIGHT AND DISTANCE-EXERCISE-12A

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