Answer :

gautamisahoo
Let the sun makes angle Ф with horizon.
Then the height h = 10 m
              base   b = 10√3 m
We have tanФ= 10/10√3 = 1/√3 = tan 30
                   Ф= 30 degree
Sun is at 30 degree elevation
tanФ=10/10√3
       =1/√3
tanФ=30

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