A street that is 40 metres long has a tree every 10 metres on both sides.  What is the total number of trees lining the entire street?

Expert Answers
hala718 eNotes educator| Certified Educator

The street is 40 meters long.

We will count the trees from the beginning of the street to the end.

There are two trees on the beginning of the street==> 2 trees

After 10 meters, there are two more trees ==> 2 trees

After 20 meter, there are two more trees ==> 2 trees

After 30 meters, there are two more trees ==> 2 trees

After 40 meters, there are two more trees==> 2 trees

Now counting all trees we have : 2 + 2 + 2 + 2+ 2 = 10 trees.

Then, the total number of trees lining the street is 10 trees.