Answers

2016-03-06T11:23:07+05:30
Taking length of tower as the perpendicular and the length of shadow as the base we get : 
tan theta = p/b 
now b/p = root3/1 
p/b = 1/root3 (reciprocal of b/p)
1/root 3 is the value for tan 30. 
Hence, angle of elevation is 30 degrees.
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2016-03-06T15:05:47+05:30
3+1=4
ratio 3 =180/4×3 =
45×3 = 135.
ratio 1 =180/4×1 =
45×1 =45.
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