Six trucks will be used to build the roadside 18 days. After 3 days, two more trucks were sent to build. How long will it take for material move?

Correct result:

t =  14.25 d


a=6 18=108 b=a3 6=1083 6=90 t=3+b/(6+2)=3+90/(6+2)=574=574 d=14.25 d

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