A heavy rope, 60 ft long, weighs 0.8 lb/ft and hangs over the edge of a building 110 ft high. How much work is done in pulling the rope to the top of the building? 1440 ft-lb

1550 ft-lb

1530 ft-lb

1510 ft-lb

1540 ft-lb

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

correct answer is b. 27/8

step-by-step explanation: