Since it is 50% taller, then 180 inches is 100% + 50% = 150% of its height then.
So each 1% is equal to 180/150 = <<180/150=1.2>>1.2 inches.
So, its height then was 1.2 x 100% = 120 inches.
Since 1 foot is equal to 12 inches, then 120 inches is equal to 120/12 = <<120/12=10>>10 feet.
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