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How many minutes will it take for the water to reach a height of 21 cm?

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Substitute the height y = 21 cm into the linear relationship y = 3x. Solving the resulting equation 21 = 3x gives x = 21 / 3 = 7. It will take 7 minutes.

Cbse released Class 9 Ganita Manjari Part 2 book
Chapter 13 Two Variables, One Line (Ganita Manjari 2) Solutions

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1 Answer

  1. Using the equation of the line y = 3x, where y represents the height in centimetres and x represents the time in minutes, set y = 21. This yields the linear equation 3x = 21. Dividing both sides by 3 gives x = 21 / 3 = 7. Therefore, it will take exactly 7 minutes for the water to reach a height of 21 cm.

     

    For more NCERT Solutions of Class 9 Maths Ganita Manjari Part 2 Chapter 13 Two Variables, One Line Question Answer (2026-27)

    https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-13/

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