The longer the car is, the easier it is to make it more aerodynamic / lower drag. It allows for a more gradual shape change allowing the air to stay attached, follow the curves of the body and not become turbulent. The lower the drag is, the higher the top speed will be with the same power. If the weight doesn't increase "too much", the MPG will also increase with the lower drag.
# it is almost 2000-3000 # it also somtimes is 500000 #
No....
The placement wouldn't affect the speed, but would affect the handling.
It would affect its speed because the weight of the car is gonna slow it down
no
Weight
In terms of physics, the length makes no difference.
Aerodynamics, weight of the car, horsepower of the engine, are all factors in the speed the car can travel.
It changes the air resistance of the car - which is the controlling factor of top-speed.
The more weight the car has the slower it goes.
The weight, aerodynamics, horse power and gear ratios all affect the speed of an automobile.
The cross sectional area of a car is dependent on its height. As the area changes the drag on the car, it is likely that increasing the height of a car will also reduce its top speed. There are many other factors that affect a car's maximum speed so a change in height may not always result in a change in top speed.