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Sahay Sir > Question Answers > NCERT Class 10 > Maths > Chapter 5 - Arithmetic Progressions > In a school students thought of planting trees in and around the school to reduce air pollution. it was decided the no of trees that each section of each class will plant will be the same as the class in which they are studying .eg.. a section of class 1 will plant 1 tree, a section of class 2 will plant 2 trees and so on till class 12.there are 3 sections of each class. how many trees will be planted by the students?

In a school students thought of planting trees in and around the school to reduce air pollution. it was decided the no of trees that each section of each class will plant will be the same as the class in which they are studying .eg.. a section of class 1 will plant 1 tree, a section of class 2 will plant 2 trees and so on till class 12.there are 3 sections of each class. how many trees will be planted by the students?

Also find the sum of the first 15 terms in each case. an = 3 + 4n