Q.

A pole 10 m high cast a shadow 10 m long on the ground, then find the sun’s elevation.


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a

60

b

45

c

30

d

90 

answer is B.

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Detailed Solution

Given,
Pole height AB= 10 m,
Cast a shadow AC= 10 m.
Question ImageIn BAC we have,
tanθ=ABBC
tanθ=1010
tanθ=1
tanθ=tan45o
On comparing we get,
θ=45
So, sun's angle of elevation θ=45.
Hence, the option 2 is correct.
 
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