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For lots of reasons. They avoid hitting into objects on land. They can avoid storms and other bad weather by flying over them. They can take advantage of movements in the air to speed up their journeys. The atmosphere is thinner which can also help their speed. There are many other reasons too.
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∙ 15y ago
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Do aeroplanes fly in the troposphere?
Yes, aeroplanes fly in the troposphere
How long after thyroid surgery can you fly in aeroplanes?
with in 48 hours u can fly in aeroplanes.
How do aeroplanes fly in the sky?
by raders
If aeroplanes couldn't fly?
then there is no point of them
What can pilot do?
Fly aeroplanes and helicopters
Why do aeroplanes have a streamlined body?
to fly
Does aeroplanes go over the Mount Everest?
Aeroplanes can fly at the same height as Mount Everest but they do not directly fly over the mountain but near by.
Can aeroplanes fly over pyramid?
Yes. They can fly over anything.
What can a pilot do with a pilots license?
You can fly planes with it, retard.
Which animal can fly but cannot lay eggs?
Humans! We have developed helicopters, aeroplanes etc to overcome our inability to fly, so we "can't fly", but we can! :-)
Can aeroplanes fly to Mars?
if you want them too
How do people fly and poop?
There are toilets in the aeroplanes.
