sir this is the question from the book -ML aggarwal( avichal publication) class 10th , chapter20 , heights and distances
we have been that A river is 60 m wide.
A tree of unknown height is on one bank.
The angle of elevation of the top of the tree from the point exactly opposite to the foot of the tree on the other bank is 300.
now we have to Find the height of the tree.
a very important question
question no 5 , heights and distances , ICSE board