If a third of a number is 8, then to find the total number, you have to multiply the number by 3, as 1/3 by 3 is 3/31, which is 1. 8x3 is 24.
Therefore, the number that you're looking for is 24
Hope this helps :)
Step-by-step explanation: it’s been half an hour and they ran the 12 miles so in an hour which is double half an hour they ran two times what they did in half an hour