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Streamlined makes it more aerodynamic, which makes it offer less resistance to air. This increases its performance and fuel efficiency
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Cause it reduces the amount of air drag thus allowing less amount of energy to be wasted and reducing the friction. if cars were designed like trucks it would increase friction which would be a great problem for racing cars. this goes same for the planes .
to move swiftly in the air
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mark as brainliest , if helpful plzz
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