Sally has a pet snail that fell into a well. The well is 16 feet deep. Each day, the snail climbs up 5 feet, but each night, it slides back down 4 feet. How many days will it take for Sally's snail to get to the top of the well?|||The net speed per 24 hours is 5 - 4 = 1 foot.
1 ft / 24 hrs = 16 ft / x hrs
16 * 24 hrs = 16 days (384 hrs)|||12 days.
Per day and night, it makes a net progress of 1 foot. After 11 days and nights, it will have made 11 feet progress. On day 12, it will make another 5 feet, meaning it has climbed 11+5 = 16 feet, so it will be out of the well.
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