About how many years did it take the Bantu to reach southern africa?

About 1000 years.

Explanation:

As the exact origin of the Bantu speaking people, it is hard to gauge the exact timeline. However, it is believed that the Bantu expansion arrived in South Africa around 300 AD. This is known by the evidence of their expansion through the development of their language. Expansion moved from central Africa to Southern Africa through modern-day Namibia and Mozambique over time. Terracotta masks give clear indicators of the civilization spreading to South Africa.