Yes you can, but you must not attempt to hide any known faults.
Your speedometer is broken.
Yes
because your car is broken
no
broken cable? Broken gear at transmission end? Broken gear at speedometer head?
you may have a broken speedometer cable. you may have a broken speedometer cable.
yes it can run safely provided you can control the speed with accelerator and gears.
Speedometer can determine a car's normal and maximum speed.
There may be a broken gear inside the odometer.
The odds are that the speedometer cable is snapped (it will not look broken so you can not tell without disconnecting it) or the transmission speedometer output gear is broken. Y-THINK-Y
Most common would be speedometer cable has broken Remove speedometer head and move vehicle to see if cable moves- if not probably broken - if it does probably problem with speedometer head