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,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
Answer:
Correct Answer: It suffered from instability and civil war.
Explanation:
Roamn Empire was in the process of disntegration despite the efforts made by Emperor Constatine and Diocletian inorder to save it. The disntegration finally happened in 395 leading to the disintegration of the Empire into two- Western and Eastern Empire.
As a result of the fact that Western Empire is not economically prosperious as well as the rot in its courts, admistrating system, this led to it being vulnerable to invasion by the Goth (Germanic tribes).
The Mississippi is important to American because of how long it is. It starts in Minnesota and drains into the gulf of Mexico. Many people have built their homes along and near the "Mighty Mississippi" because you can transport goods down it via boat to many states, you can use it to farm and get water to dry locations and grow many crops. It's used for hydroelectric power for large cities, it drains off flood water to prevent flooding in the Midwest. It was very important during the civil war and many boats battled for control of it. And it's a lot cheaper and faster to transport on the river than on the road, it has many dams that help local economies and create job opportunities for locals.
