Question

This problem consists of two parts. It is about earthwork activity on site. Part A: Sketch a balance curve for a truck-hauling operation with two excavators operating in tandem at 175 cy/hr each and trucks operating at 42 cy/hr each. Show all your calculations. (10 points) Part B: Also, sketch the $/cy vs. trucks curve (plus/minus 2 trucks from the balanced number) if each excavator operates at $110/hr and each truck operates at $70/hr. For example, if you select 6 trucks, develop data points and a curve for 4, 5, 6, 7, and 8 trucks. Show all your calculations. (10 points) You can submit files for this question.

Answer 1

Part A:

The total number of cueles of encanadors = 175x2 So, duration of one cycle 60x60 - 10.2857 seconds = 350 cycles ho 350 = 85.7143 sec 42 The duration of one cycle of truck - 60x60 number of trucks required per cycle of excavators 85. 7143 .8.33 trucks I/ we select balance aften 10.2857 8 trucks total, the operation will become 3 hours number of cycles of excavators in 3hrs = 350x3 = 1050 cycles and the number of trucks in 3hrs 1050 excles = 8.33 trucks x42x3 = Truck 1 2 3 1 1 6 7 8 10.1875 Seconds к one truck Cycle of 85,7143 see 85. H43 Sec 1050 cycles for shona

Part B:

110 x85.7143 Toxbo The truck cycle duration = 85.7143 Sec $ for this duration required for encarea for 2.62 2.12$ $ for this duration required for truck driver = $ 1.67 so for 8 trucks, & required per truck cycle = (2.62 +1.677x8 & 4.29x8 & 34.32 42 = Similarly find cycle duration of 6,7,9&10 tricks There will be idle time when trucks are less than & (for eacana tors) & there will be idle time for trucks when number of trucks are greater than 8

Thank you so much sir.