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Taran kumar
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Asked: 2020-11-04T04:12:46+00:00 In:

A rhombus shaped field has green grass for 18 cows to graze. If each side of the rhombus is 30 m and its longer diagonal is 48 m, how much area of grass field will each cow be getting?

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NCERT Solutions for Class 9 Maths Chapter 12
Important NCERT Questions
Heron’s Formula
NCERT Books for Session 2022-2023
CBSE Board, UP Board and Other state Boards
EXERCISE 12.2
Page No:207
Questions No:5

2020-2021cbsechapter 12class 9heron’s formulamathematicsncert
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    2 Answers

    1. Get Hindi Medium and English Medium NCERT Solution for Class 9 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-9/maths/chapter-12/

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    2. Best Answer
      A rhombus shaped field has green grass for 18 cows to graze. If each side of the rhombus is 30 m and its longer diagonal is 48 m, how much area of grass field will each cow be getting?

      Join the diagonal AC of quadrilateral ABCD.
      Here, the sides of triangle ABC are a = 30 m, b = 30 m and c = 48 m.
      So, the semi-perimeter of triangle
      S = a + b + c/2 = 30 + 30 + 48/2 = 108/2 = 54 m.
      Therefore, area of triangle = √s(s – a)(s -b)(s -c)
      = √54(54 -30)(54 -30)(54 -48) = √54(24)(24)(6) = √186624 = 432 m²
      Hence, area of quadrilateral = 2 × 432 = 864 m²
      Therefore, the area grazed by each cow = Total area/number of cows = 864/18 = 48 m²

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