# In a school, students decided to plant trees 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 double of the class in which they are studying. If there are 1 to 12 classes in the school and each class has two sections, find how many trees were planted by students. Which value is shown in the question?

Number of trees planted by one section of class 1st = 2

Now, there are 2 sections, Number of trees planted by class 1st = 4

Number of trees planted by one section of class 2nd = 4

Now, there are 2 sections, Number of trees planted by class 2nd = 8

This will follow up to class 12th and we will obtain an AP as

4, 8, 12, … upto 12 terms.

Now, Total number of trees planted by the students = 4 + 8 + 12 + … upto 12 terms.

In this Arithmetic series, first term = a = 4

Common difference = d = 4

Now, S12 = (12/2)[2a + (12 - 1)d]

= 6[2(4) + 11(4)]

= 6 × [8 + 44]

= 6 × 52

= 312

Total number of trees planted by the students = 312

Values shown in the question are care and awareness about conservation of nature and environment.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Champ Quiz | Arithmetic Progression34 mins
Champ Quiz | Arithmetic Progression30 mins
Lets Check Your Knowledge in A.P.49 mins
Arithmetic progression: Previous Year NTSE Questions34 mins
Quiz on Arithmetic Progression Quiz32 mins
Arithmetic Progression Tricks and QUIZ37 mins
Quiz | Group of Questions on General Term of an A.P49 mins
Become a Master of A.P. in 45 Minutes!!47 mins
Get to Know About Geometric Progression41 mins
NCERT | Solving Questions on Introduction of A.P42 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses