In a school , students decided to plant trees in and around the school to reduce air pollution. It was decided that the no. of trees , that each section will plant , willbe 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 the students .
Here's the link for the solution of your query:
https://www.meritnation.com/ask-answer/question/in-a-school-sudent-t-hought-to-planting-trees-in-and-around/arithmetic-progressions/6789014
https://www.meritnation.com/ask-answer/question/in-a-school-sudent-t-hought-to-planting-trees-in-and-around/arithmetic-progressions/6789014