depends on the plane.
because planes are fast and they can go to place that boats, cars, ect. can not. and for quicker transportation
no not at all they are very slow, slower than snails
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yes
1 metre per hour
Some rocket planes can go as fast as six times the speed of sound. Most military fighter planes do not go faster than twice the speed of sound, and the typical civilian passenger/transport plane goes slower than the sound barrier.
149,057
planes are used for cargo shipping, passenger shipping, or just sight seeing.
yes
streamlining is important because with out it cars,planes and some boats would go to fast and out of control
About 300mph. They are not the fastest cars though - unlike with planes, jet cars are faster.