Solution :
It is given that Little Snail is going to visit one of his friend at the pond which is 3 miles away.
When the snail crawls 1/2 of a mile per day, it will take him, ![$1 \times \frac{2}{1} \times 3$](https://tex.z-dn.net/?f=%241%20%5Ctimes%20%5Cfrac%7B2%7D%7B1%7D%20%5Ctimes%203%24)
= 6 days to get to the next pond.
When the snail crawls 1/3 of a mile per day, it will take him, ![$1 \times \frac{3}{1} \times 3$](https://tex.z-dn.net/?f=%241%20%5Ctimes%20%5Cfrac%7B3%7D%7B1%7D%20%5Ctimes%203%24)
= 9 days to get to the next pond.
When the snail crawls 1/4 of a mile per day, it will take him, ![$1 \times \frac{4}{1} \times 3$](https://tex.z-dn.net/?f=%241%20%5Ctimes%20%5Cfrac%7B4%7D%7B1%7D%20%5Ctimes%203%24)
= 12 days to get to the next pond.
When the snail crawls 3/4 of a mile per day, it will take him, ![$1 \times \frac{4}{3} \times 3$](https://tex.z-dn.net/?f=%241%20%5Ctimes%20%5Cfrac%7B4%7D%7B3%7D%20%5Ctimes%203%24)
= 4 days to get to the next pond.
When the snail crawls 2/3 of a mile per day, it will take him, ![$1 \times \frac{3}{2} \times 3$](https://tex.z-dn.net/?f=%241%20%5Ctimes%20%5Cfrac%7B3%7D%7B2%7D%20%5Ctimes%203%24)
= 4.5 days to get to the next pond.