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Home/ Questions/Q 1738
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Nimit Singh
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Nimit Singh
Asked: December 30, 20202020-12-30T04:18:34+00:00 2020-12-30T04:18:34+00:00In: Class 10 Maths

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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NCERT Solutions for Class 10 Maths Chapter 5
Important NCERT Questions
Arithmetic Progression
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 5.3
Page No:113
Questions No:17

2020-2021arithmetic progressioncbsechapter 5class10mathematicsncert
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    1. Padmarati Singh
      2021-07-28T07:03:17+00:00Added an answer on July 28, 2021 at 7:03 am

      Get Hindi Medium and English Medium NCERT Solution for Class 10 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-10/maths/chapter-5/

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      jaanvi roy
      2023-01-30T11:49:55+00:00Added an answer on January 30, 2023 at 11:49 am

      Each section of each class will plant tree = 3 × Class, therefore
      Total number of tree planted by class i = 3 × 1 = 3
      Total number of tree planted by class ii = 3 × 2 = 6
      Total number of tree planted by class iii = 3 × 3 = 9
      Similary, the series of trees planted by classes are as follows: 3, 6, 9, …., 36
      Here, a = 3, d = 6 – 3 = 3 and n = 12.
      The sum of n terms of an AP is given by S_n = n/2[2a + (n -1)d]
      ⇒ S₁₂ = 12 /2[2(3) + (12 – 1)(3)]
      = 6[6 + 33] = 6(39) = 234
      Hence, the total number of tree planted by the students is 234.

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