Answers

2016-03-17T08:02:43+05:30
Height of tower=20
let sun's altitude be x
the shadow's = 20 root 3
I.e tan theeta= 20/20root3
= 1 / ROOT 3
I.e theeta = 30 degree
and sin 30=20/x
1/root2= 20/x
x=20 ROOT 2
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2016-03-17T08:05:31+05:30
Given,
AB=20 m,BC=20√3
now the sun's altitude is 1/√3 i.e.,tan 30°
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