Substitute x = 5 minutes into the equation y = 3x, which models the water level. This gives y = 3 × 5 = 15. Therefore, the water level reaches a height of 15 cm.
NCERT Solution for Class 9 Ganita Manjari Part 2 chapter 13 question answer
NCERT Solution for Ganita Manjari Part 2 chapter 13 Two Variables, One Line solutions
The relationship between time x in minutes and water height y in centimetres is governed by the linear equation y = 3x. To find the water height after 5 minutes, substitute x = 5 directly into the equation: y = 3(5) = 15. Thus, after 5 minutes of filling, the water level in the tank reaches a height of exactly 15 cm.
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