Answer:
Explanation:
Given
altitude of the Plane 
When Airplane is
away
Distance is changing at the rate of 
From diagram we can write as

differentiate above equation w.r.t time

as altitude is not changing therefore 

at 
substitute the value we get 

Explanation:
The angular momentum is doubled because it is proportional to the angular velocity.
The most i can help with is Saliva glands or salivary glands
Highlands
The Lunar Highlands
Which are 4.4 Billion Years old