A) 24

B) 27

C) 30

**Step-by-step explanation:**

The distance between each tree =3

So, the distance between 8th and 7th = 3

7th and 6th =3and so on

8th to 7th + 7th to 6th + 6th to 5th + 5th to 4th + 4th to 3th + 3th to 2nd + 2nd to 1st

7 (3) =**21**

**Related MCQs:**

- What is the total straight line distance between Chabahar port and Gwadar port?
- The total distance from the school to house is 39 km. Abid covered a distance of 13 km What percentage of the whole distance has he covered?
- A cube has a volume of 8 cubic meters, If each side is doubled in length what will its new volume be in cubic meters?
- A car travels at the speed of 36 km per hour. What is the distance traveled by the car within 20 seconds in meters