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Question

Question 15
A pole 6m high casts a shadow 23 m
long on the ground, then the Sun’s elevation is

(A)
60
(B) 45
(C) 30
(D) 90

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Solution

The answer is (A).
Let BC = 6m be the height of the pole and
AB=23m be the length of the shadow on the ground.
Let the Sun makes an angle
θ on the ground.

Now, in ΔBAC,

tanθ=BCAB

tanθ=623=33×33

tanθ=333=3=tan60

θ=60

Hence, the Sun’s elevation is 60


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