The amount of work doneby two boys who apply 200N of force in an unsuccessful attempt to move a stalled car is

Work done = force applied in the direction of work*distance the object moves in direction of force

In this case, even though force of 200 N is applied, the attempt to move car is unsuccessful, such that the object does not move. hence distance moved is 0 m. Therefore, work done = 200*0=0. Hence no work is done