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,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
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Answer:
Lin relied on aggressive moral tone, meanwhile proceeding relentlessly against British merchants in a manner that could only insult their government. The only lesson Lin drew from China’s humiliation was that it was necessary to learn more about these “barbarians” and to import their technology. He could neither comprehend the implications of the European challenge nor overcome the weakness and conservative opposition of his contemporaries. Later, the so-called Self-Strengthening Movement adopted Lin’s program of reform; still later generations of revolutionaries abandoned Chinese culture in order to save China but accepted Lin as a national hero because of his courage and example in opposing the British.
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answer:
Las guerras napoleónicas tuvieron consecuencias dramáticas para la economía española. La Guerra de la Independencia tuvo un impacto demográfico mayor que cualquier otro conflicto militar, incluidas las guerras civiles, en la era moderna. Los agricultores sufrieron la confiscación de sus cultivos y la destrucción de su principal activo de capital, el ganado.
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