A Heavy Rope $40 \mathrm { ft }$ Long, Weighs $0.7 \mathrm { lb } / \mathrm { ft }$

Multiple Choice

A heavy rope, $40 \mathrm { ft }$ long, weighs $0.7 \mathrm { lb } / \mathrm { ft }$ and hangs over the edge of a building $110 \mathrm { ft }$ high. How much work is done in pulling the rope to the top of the building?

A) $670 \mathrm { ft } - \mathrm { lb }$
B) $650 \mathrm { ft } - \mathrm { lb }$
C) $560 \mathrm { ft } - \mathrm { lb }$
D) $630 \mathrm { ft } - \mathrm { lb }$
E) $660 \mathrm { ft } - \mathrm { lb }$