Question
A bird was flying in a line parallel to the ground at a height of 2000 metres. Tom, standing in the middle of the field, he observed the bird making an angle of elevation . After 3 minutes, he again observed it with an angle of elevation of , the speed of the bird in kilometers per hour is:
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Text solutionVerified
Height of the bird from the ground = m
Angle of elevation =
After 3 minutes, angle of elevation =
Let the distance when angle is be and when angle is be
Now,
Now, distance travelled in 3 minutes,
m = 1.464 km
Thus speed =
speed =
speed = km/hr
Angle of elevation =
After 3 minutes, angle of elevation =
Let the distance when angle is be and when angle is be
Now,
Now, distance travelled in 3 minutes,
m = 1.464 km
Thus speed =
speed =
speed = km/hr
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Question Text | A bird was flying in a line parallel to the ground at a height of 2000 metres. Tom, standing in the middle of the field, he observed the bird making an angle of elevation . After 3 minutes, he again observed it with an angle of elevation of , the speed of the bird in kilometers per hour is: |
Answer Type | Text solution:1 |
Upvotes | 150 |