In ancient China, soldiers positioned in beacon towers along the Great Wall would send smoke signals to warn of impending attacks. Since the towers were located at 5 kilometer intervals, they could send a signal the length of the Great Wall. If the Great wall was 7300 kilometers long, and every tower had two soldiers, what was the combined number of soldiers in beacon towers on the Great Wall? Let's be accurate as possible.
If there were beacon towers every 5 kilometers along the 7300 kilometer length of the Great Wall, then there were 7300 / 5 = 1460 beacon towers. If every tower had two soldiers, then there were a total of 1460 * 2 = 2920 soldiers in beacon towers along the Great Wall.
The answer: 2920.