The Square Root Of 4900 Is Defined As The Only Positive Real Number Such That, Multiplied By Itself, It Is Equal To 4900. This means that the first 5 decimal places are correct. The cube root of x is given by the formula: ⇒ 49000 = 2 2 2 1 5 2 5 1 7 2. The Square Root Of 4900 Can Be Written As (4900) 1/2. For example, 200 is the square root of 40000 because 200 2 = 200•200 = 40000,.