available three excavators a 315DL 320D Japan and 324D Japan

available three excavators a 315DL, 320D (Japan) and 324D (Japan). Their lease/operating costs are S150/hr, $225/hr, and S300/hr. You have to scoop out 5,000 cu. yds. using the maximum rated bucket capacity for each. Assuming that each piece of equipment has adequate front and side reach capacity, which piece of equipment would you use?

Solution

Piece of equipment would be

=[(315×150)+(320×225)+(324×300)]÷(5000)

Note= find the volume of each excavators and then add to all volume And finally divided by the given volume 5000

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