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On a 75 feet rope, A snail crawls up 5 feet during the day and slides down 4 feet in the night. How many days/nights will it take for the snail to completely crawl up the 75 foot rope?

 Aug 14, 2020
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Everyday the snail gains 5-4 = 1 foot    BUT toward the end the snail will be at the top before sliding back down:

  on day 71 before starting the climb, snail will be at 70 ft...... then climbs up 5 ft   and is at the top......71 days

 Aug 14, 2020

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