**A snail fell into a well that is 300 cm deep.**

**In the first hour, it climbed 80 cm up the well.**

**In the second hour, it climbed 70 cm up the well.**

**Each hour, it managed to climb 10 cm less than the hour before.**

**How many hours did it take to climb out of the well?**

**Solution**

1st h --> 80 cm

2nd h --> 70 cm

3rd h --> 60 cm

4th h --> 50 cm

5th h --> 40 cm

(80 + 70 + 60 + 50 + 40) cm = 300 cm

--> 5 hours

**Answer: 5 h**

## 3 comments:

人應該做自己認為對的事，而不是一味跟著群眾的建議走。 ..................................................

Very good share ~ message support

...................................

Your article very good ~ continues to share to everybody..................................................

Post a Comment