In the given number 9261, the second group of 3 digits from the right is 009. This number lies between two perfect cube numbers 8 and 27 i.e. 23 and 33. Because 9 is more close to 8 i.e. 23, the ten's digit of the cube root of 9261 is 2. The cube root of 9261 found using the estimation method is 21.
