. A boy standing on a horizontal plane finds a bird flying at a distance of 100m from him at an elevation of 300. A girl standing on the roof of 20m high building, finds the angle
plz find provide me gig too
Answers
Answered by
1
Answer:
ANSWER
Let A be the position of the bird and E and C be the positions of the girl and the boy, respectively.
Then,
∠ACB=30
o
,∠AED=45
o
,AC=100 m,EF=20 m
In right △ACB,
we have,
sin30
o
=
AC
AB
2
1
=
100
AB
AB=50 m
AD=AB−BD
AD=50−EF
AD=50−20=30 m
In right △ADE, we have,
sin45
o
=
AE
AD
2
1
=
AE
30
AE=30
2
=42.3 m
Therefore, the distance of bird from the girl is 42.3 m.
Similar questions