Home/ Questions/Q 2209
Next
Answered
Jagannath Dixit
  • 6
Asked: 2020-11-05T06:31:21+00:00 In:

The diameter of the moon is approximately one fourth of the diameter of the earth. Find the ratio of their surface areas.

  • 6

NCERT Solutions for Class 9 Maths Chapter 13
Important NCERT Questions
Surface Areas and Volumes
NCERT Books for Session 2022-2023
CBSE Board, UP Board and Other state Boards
EXERCISE 13.4
Page No:225
Questions No:7

2020-2021cbsechapter 13class 9mathematicsncertsurface areas and volumes
Share

    2 Answers

    1. Best Answer

      Let, the radius of earth = R, Therefore, the diameter of earth = 2 R
      According to question, diameter of moon = 1/4(2R), So, the radius of moon
      = (1/4(2R)/2) = 1/4 R
      Now,
      Surface area of moon/surface of earth = (4π(1/4R)²)/4π(R)² = (1/16R²)/R² = 1/16
      Hence, the ratio of surface areas of moon to earth is 1: 16.

      • 2

    2. 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-13/

      • 2
    Leave an answer

    Leave an answer

    Browse