Question

A person standing on the bank of a river observe the angle of elevation of the top of a tree standing on the opposite side of bank is 60 degree when he moves 40 m away from the bank he finds the angle of elevation is to be 30 degree find the height of the tree and the width of the river

Answer 1

gaga river I am help hand

Answer 2

tan 60°=h/x tan 30°=h/40+x ...by solving h=√3x...we get  h=20√3 mts and width x=20 mts