SSC CGL 26 Oct 2014 Shift 1 Paper

Question : 131 of 200

Marks: +1, -0

The length of the shadow of a tower is 9 metres when the sun’s altitude is 30°. What is the height of the tower ?

Solution:

AB = Tower
BC = Shadow = 9 metre
In Δ ABC,
tan 30° =

{AB}/{BC}

⇒

1/√3

{AB}/9

⇒ AB =

9/√3

3√3

metre

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