Question

In a school student decided to plant tree and in and around the school to reduce air pollution it was decided that the number of trees that each section of each class will plant will be developed the class in which they are studying in the in there is 1 to 12 class in the school and each class has to Section and the how many aware planted by student which value is so in the question

Answer 1

Answer:

Number of trees planted by each class= sections×classnumber×2

Class 1 will plant = 2×1×2=4

Class 2 will plant = 2×2×2=8

Class 3 will plant = 2×3×2=12

Similarly, Class 12 will plant = 2×12×2=48

Thus, It is an A.P. 4, 8, 12, ....48

with first term = 4

Common difference = 4

last term = 48

Thus, Sum,s=

2

n

(a+l)

s=

2

12

(4+48)

s=6×52

s=312

Thus, 312 trees will be planted by all the classes.