Velocity of the Motorcycle:
The velocity of the motorcycle is given as 60 km/h.

Velocity of the Jeep:
The velocity of the jeep is given as 80 km/h.

Observation of the Thieves:
The question asks for the velocity of the jeep as observed by the thieves.

Relative Velocity:
To calculate the velocity of the jeep observed by the thieves, we need to consider the concept of relative velocity. Relative velocity is the velocity of an object as observed from another object in motion.

Approach:
To find the velocity of the jeep observed by the thieves, we need to subtract the velocity of the motorcycle from the velocity of the jeep.

Calculation:
The velocity of the jeep is 80 km/h and the velocity of the motorcycle is 60 km/h. To find the velocity of the jeep observed by the thieves, we subtract the velocity of the motorcycle from the velocity of the jeep.

Velocity of the jeep observed by the thieves = Velocity of the jeep - Velocity of the motorcycle
= 80 km/h - 60 km/h
= 20 km/h

Explanation:
The velocity of the jeep observed by the thieves is 20 km/h. This means that the thieves perceive the jeep to be moving at a speed of 20 km/h relative to their own motion.

When the jeep is moving at 80 km/h and the motorcycle is moving at 60 km/h, the velocity of the jeep observed by the thieves is 20 km/h. This means that the thieves see the jeep moving towards them at a speed of 20 km/h.

Summary:
The velocity of the jeep observed by the thieves is 20 km/h. This means that the thieves perceive the jeep to be moving towards them at a speed of 20 km/h.