The basic unit of speed is:
msec
m/sec
km/sec
m/hour
The basic unit of distance is metres
The basic unit of time is seconds ∵Speed=DistanceTime
So, the basic unit of speed would be, m/sec.
The escape speed of any projectile on Earth's surface is 11.2 km/s. A body is projected with thrice this speed. What is the speed of the body far away from the earth? Ignore the presence of the sun & other planets.