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From the top of a tree 20 metres high,the angle of depression at a point on the opposite bank of a river is found to be 30° .Find the breadth of the river.
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From the top of a tree 20 metres high,the angle of depression at a point on the opposite bank of a river is found to be 30° .Find the breadth of the river.

User Drstevok
by
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1 Answer

3 votes

Answer:

17.3

Explanation:

sin(30)=0.5

0.5*20=100

20*20+x*x=100

x=17.3

User Cornelio
by
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