Two choices for borrow soil are available: It will be necessary to fill a 200 00

Question

Two choices for borrow soil are available:
                    It will be necessary to fill a 200 000 yd3 depression, and the fill material must be compacted to 95% of the standard Proctor (maximum) density. A final 10%                    moisture content is desired in either case. (a) What is the minimum volume of borrow from each site needed to fill the depression? (b) What is minimum quantity                    (volume) of material from each site to haul? (c) What soil would be cheaper to use?

                    Borrow                    A                                                        Borrow B
                    115pcf       Density in place 1           20pcf
                    ?               Density in                    transport          95
                    0.92          Void ratio in transport        ?
                    25%           Water content in place     20%
                    $ 0.20/yd^3    Cost to excavate     $ 0.10/yd^3
                    $ 0.30/yd^3         Cost to haul        $ 0.40/yd^3
                    2.7                                            Gs                        2.7
                    112 pcf    Maximum proctor dry density    110

Explanation / Answer

a) 5.4*10^6 ft^3

b) 4.8*10^6 ft^3

c) borrow A by $6200

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