Question

In a school, students thought of planting trees in and around the school, to reduce air pollution. What values can you infer from the planting of trees. ​

Answer 1

Explanation:

Let the A.P be

1 × 3 , 2 × 3 , 3 × 3 ..............12 × 3

3 , 6 , 9 ............36

a ( first term ) = 3

d ( common difference ) = 6 - 3 = 3

an = 36

n = 12

Sn = ?

Sn =

\frac{n}{2} (a + an)

2

n

(a+an)

\frac{12}{2} (3 + 36)

2

12

(3+36)

6 ( 39 )

234

So the total number of plants planted are 234 !!