Use dimensional analysis to determine which rate is greater. Tortoise A walks 63.0 feet per hour and tortoise B walks 12 inches per minute. Which tortoise travels faster? Complete the explanation. If I convert the rate of tortoise A to the same units as the rate of tortoise B, tortoise A travels Inches per minute and tortoise B travels 12 inches per minute. So, by comparing the two speeds using the same units I can tell that (select) v travels faster.