How did the mechanization of the mining industry affect
the american economy?

By the coming of the industrialization, led to an increase in the mining industry because it provided coal, iron ore, etc., to run factories.

Explanation:

The mining industries began to grow during the industrial revolution in Europe and America. Iron ore and coal played a crucial role in expanding industries. Companies benefited from the mining industries because it also helped in bring steamships and railroads for transpiring raw materials and as well as for the goods. More opportunities for jobs were available.

answer is 1935

because gandhi led a march the sea in 1930 and 5 years later he did it again