Federalist wanted a strong central government while anti-federalist wanted a strong state government.
Federalist supported the constitution
Anti-federalist didn’t support the constitution because they wanted a bill of rights
assuming efficiency of each man to dig trench, in one day, for one hour is constant,

so one man, working for one hour in one day can dig 1.5 m
so 8 men, working 3 hours a day and will take, say $d$ number of days and efficiency will be constant. so,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$