Answer:
B. 1400 meters.
Step-by-step explanation:
According to the statement, there are two stages for the motion of the tractor, in which we need to find the travelled distance:
(i) <em>Uniform accelerated motion.</em>
<em />
<em> </em>(1)
(2)
Where:
- Initial position of the tractor, measured in meters.
- Final position of the tractor, measured in meters.
- Initial velocity of the tractor, measured in meters per second.
- Time, measured in seconds.
- Acceleration, measured in meters per square second.
- Final velocity of the tractor, measured in meters per second.
(ii) <em>Uniform motion.</em>
(3)
Where:
- Final position of the tractor, measured in meters.
- Time, measured in seconds.
The distance covered by the tractor (
), measured in meters, is:
(4)
If we know that 
, 
, 
, 
and 
, then distance covered by the tractor is:
By (1) and (2):
By (3):
By (4):
The correct answer is B.
