Neco 2024 Islamic Religious Studies Question 21

Two trans‑Saharan trade routes were used by Muslim scholars in the 12th century. The southern route from the North‑African city of Tunis to the Ghana Empire is \(1800\) km long, while the northern route from Tunis to the Mali Empire is \(2500\) km long. Scholars started their journeys simultaneously in the year \(1100\) CE. On the southern route, a scholar travels at an average speed of \(20\) km per day and the Ghanaian ruler adopts Islam \(4\) years after the scholar's arrival. On the northern route, a scholar travels at an average speed of \(30\) km per day and the Malian ruler adopts Islam \(5\) years after the scholar's arrival. Which empire adopted Islam earlier, and in what year did that adoption occur? Express the answer as the empire name followed by the year (e.g., "Ghana 1104").