Answer:
The snail will reach the top of the coconut in 18 hours.
Step-by-step explanation:
If the snail will climb 2 meters in 1 hour but it will slip down one meter for every 2 meters climbed, then the distance traveled will be:
Since in 1 hour, it climbs 2 meters minus 1 meter, the time in which the snail will reach the top is:
Therefore, the snail will reach the top of the coconut in 18 hours.
I hope it helps you!