What is the work done by a 20 newton force applied at an angle of 45.0° to move a box a horizontal distance of 40 meters?

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

i think its c if i'm wrong