an aeroplane at an altitude of 200 m observe the angle of depression of opposite point on the 2 banks of a river at two points to be 45 degree and 60 degree find the width of the river
Answers
Answered by
0
546.41 m is the width
mikku0603:
is it correct?
Answered by
2
In triangle abc
Tan 60 ° = AB/BC
√3=200/BC
BC=200 √3/3. ----1
In triangle Abd
Tan45°=200/BD
BD=200. -----2
BD+BC=width of river
200+200√3/3
200(3+√3/3)
Tan 60 ° = AB/BC
√3=200/BC
BC=200 √3/3. ----1
In triangle Abd
Tan45°=200/BD
BD=200. -----2
BD+BC=width of river
200+200√3/3
200(3+√3/3)
Attachments:
Similar questions