Answer:As trade in gold and salt increased, Ghana's rulers gained power. Eventually, they built up armies equipped with iron weapons that were superior to the weapons of nearby people. Over time, Ghana took control of trade from merchants. Merchants from the north and south then met to exchange goods in Ghana.
As salt was worth its weight in gold, and gold was so abundant in the kingdom, Ghana achieved much of its wealth through trade with the Arabs. Islamic merchants traveled over two months through the desert to reach Ghana and "do business." They were taxed for both what they brought in and what they took out
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