Question

The angle of elevation of a jet plane
from a point on the ground is 009
After a flying / flight of 30 sec, the
angle of elevdtion changes to 302
"If the jet plane is fhuing at a consta-
at height of 300013 m. Find the speed
of jet planes

DONT SPAM ,IF THEN I WILL MUST SURE TO DELETE ACCOUNT. ​

Answer 1

7200m

it will definitely help u.

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Answer 2

Answer:

Let D and E be the initial and final positions of the plane respectively

Consider the △ABD

tan60∘=ABBD

⇒3=AB15003

⇒AB=1500

Consider the △ACE

tan30∘=ACCE

⇒31=AC15003

⇒AC=4500

BC=AC−AB=4500−1500=3000m

DE=BC=3000m

i.e., the plane travels a distance of 3000 m in 15 seconds.

∴, speed of the plane =153000=200m\s.

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