17. In a school, students thought of planting trees in and around the school to reduce airpollution. It was decided that the number of trees, that each section of each class willplant, will be the same as the class, in which they are studying, e.g, a section of Class Iwill plant 1 tree, a section of Class II will plant 2 trees and so on till Class XII. There arethrec sections of each class. Ilow many trees will be planted by the students?

17. In a school, students thought of planting trees in and around the

1.	17. In a school, students thought of planting trees in and around the school to reduce airpollution. It was decided that the number of trees, that each section of each class willplant, will be the same as the class, in which they are studying, e.g, a section of Class Iwill plant 1 tree, a section of Class II will plant 2 trees and so on till Class XII. There arethrec sections of each class. Ilow many trees will be planted by the students?
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