Calculate the cost per cubic yard to place concrete using each of the alternatives described. The work in both cases consists of placing 140 cubic yards of concrete in footings. a. Using a crane and bucket at a price of $225 per hour, including an operator, with a crew consisting of 6 laborers, a cement finisher, and a foreman. The concrete will be placed in 7 hours using this setup, and transportation of the crane costs $390.

b. Using a concrete pump at a price of $295 per hour, including an operator and a crew consisting of 5 laborers, a cement finisher, and a foreman. With this setup, concrete is placed in 6 hours and transportation of the pump costs $290.

Cost per cubic yard to place concrete using each of the following alternatives:

Alternative a = $14.04

Alternative b = $14.71

Explanation:

a) Data and Calculations:

Work of concrete in footings = 140 cubic yards

a. Price of using crane and bucket = $225 per hour

Number of hours required for this setup = 7 hours

Transportation of the crane = $390

Therefore, total cost under this alternative = $1,965 (($225*7) + $390)

Cost per cubic yard = $14.04 ($1,965/140)

b. Price of using a concrete pump = $295 per hour

Number of hours required for this setup = 6 hours

Transportation of the pump = $290

Therefore, total cost under this alternative = $2,060 (($295*6) + $290)

Cost per cubic yard = $14.71 ($2,060/140)

unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.

answer:

ur mom

explanation: