Solve the Problem. -A Construction Crane Lifts a Bucket of Sand Originally Weighing

Multiple Choice

Solve the problem.
-A construction crane lifts a bucket of sand originally weighing 135 lb at a constant rate. Sand is lost from the bucket at a constant rate of 0.5 lb/ft. How much work is done in lifting the sand 70 ft? (Neglect the weight of
The bucket.)

A) 7000 ft · lb
B) 8225 ft · lb
C) 9450 ft · lb
D) 10,675 ft · lb