Answer: W = 150J
Explanation: The work is defined as a measure of energy transfer when an object is moved by an external force.
So if we are applying a force of 25N for 6 meters, the work is done can be calculated as:
W = F*D where F is a force, and D is distance.
W = 25N*6m = 150 N*m
And Newton*meter = joule, so we have that:
W = 150J