In a school, students thought of planting 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 the same as the class, in which they are studying, e.g., a section of Class I
will plant 1 tree, a section of Class II will plant 2 trees and so on till Class XII. There are
three sections of each class. How many trees will be planted by the students?
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No. of trees planted by class 1 = 1*3=3
No. of trees planted by class 2 = 2*3=6
No. of trees planted by class 3 = 3*3=9
No. of trees planted by class 4 = 4*3=12
No. of trees planted by class 5 = 5*3=15
No. of trees planted by class 6 = 6*3=18
No. of trees planted by class 7 = 7*3=21
No. of trees planted by class 8= 8*3=24
No. of trees planted by class9 = 9*3=27
No. of trees planted by class 10= 10*3=30
No. of trees planted by class 11= 11*3=33
No. of trees planted by class 12=12 *3=36
Total no. of trees planted = 3+6+9+12+15+18+21+24+27+30+33+36=234
Total no. of trees planted by the students are 234
Hope this will help u.......
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