Question

A frog is climbing out of a well that is 11 feet deep. The frog can climb 3 feet per hour but then it rests for an hour, during which it slips back 1 foot. How long will it take for the frog to get out of the well?

Answer 1

It takes the frog 7 hours to get out of the well.

Explanation:

We know that the well is 11 feet deep and the frog can climb 3 feet per hour.

Each time it climbs, it rests for an hour, and decreases its height by 1 foot.

So, if the frog reaches 3 feet in the first hour, then in the next hour it is 2 feet.

Lets calculate with the same pattern:

1st hour: 3 feet

2nd hour:
`3-1=2` feet

3rd hour:
`2+3=5` feet

4th hour:
`5-1=4` feet

5th hour:
`4 +3= 7` feet

6th hour:
`7-1=6` feet

5th hour:
`6+3=9` feet

6th hour:
`9-1=8` feet

7th hour:
`8+3= 11` feet

Therefore, it takes the frog 7 hours to get out of the well.