Therefore Required number of rolls = (45 x 24)/9 = 120.
Total number of poles needed = 27 x 4 - 4 = 108 - 4 = 104.
Then, Varan's age after 1 year = (x + 1) years.
Therefore x + 1 = 2 (x - 12) ⟺ x + 1 = 2x - 24 ⟺ x = 25.
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