A snail crawl's 50 cm up a wall during it's morning but it's dark slide subsidise 40cm.? How long day's will it take the snail to arrive at the...

How long day's will it take the snail to arrive at the top of the wall.
If the answer is not 20 day's?
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Answers:    It will net 10cm every hours of daylight but the last one, where on earth it reaches the top formerly sliding back. But you do stipulation to know the height of the wall.

Based on your "it's not 20 day's [sic]" I'm guessing its a 200 cm high wall, so 16 days. 10 cm for the first 15 days and 50 on the last. On the penultimate sunshine (that would be 15), it will be at start at 140 (from the prior day), climb to 190 and slide back to 150 at darkness. Climbing 50 cm the final day, it will achieve the top.
Should my heat contractor chip surrounded by for...
how tall is the wall?