A snail ascends a slippery wall one meter high. The snail advances three centimeters every minute and stops for another minute to rest, during which it slips and falls two centimeters.
How long will the snail take to climb the wall?
The snail will take 195 minutes in climbing the entire wall. In minute 194, he will have climbed 3cm 97 times and will have gone down 2cm 97 times what makes a total of 97 centimeters and leaves it 3cm from the end of the wall so with an additional minute he will complete his tour.