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,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
1. <span>Germany, Britain, Japan and Russia
2. </span><span>The British because of the Yangtze River.</span>
Answer:
Describe two ways in which plebeians gained more political power after the revolts of 494 BC. The Tribunes of the Plebs spoke for the plebeians and could veto actions of the Senate. ... Plebeian assemblies could pass laws for all Roman citizens and could nominate consuls, tribunes, and members of the Senate.
Explanation:
Plz give me brainliest thank u worked hard
In 1828, Jackson was elected president. He declared that the only hope for the Southeastern tribes' survival would be for them to give up all their land and move west of the Mississippi River. ... The U.S. government promised to compensate the tribes for the property they would have to abandon.