Answer
$2100 \ ft-lb$
Work Step by Step
The angle between the ramp and the flux is equal to $\theta =30^{\circ}$.
Work done: $W=|F| |d| \cos \theta \\=350 \times 12 \times \cos (90-30) \\= (350)(12) \cos 60\\= (350)(12) \times (1/2) \\= 2100 \ ft-lb$
