Option 3 : 28

**Calculation:**

√(6084) = 78

Difference between 78 and 50 = 78 - 50 = 28

**∴ 28**

**Trick to find the square root∶ **

Unit digit of 6084 = 4

∵ We know that unit digit of 2^{2} = 4 and unit digit of 8^{2} = 4

The square root must be a number whose unit digit will be either 2 or 8.

The 1st 2 digits of the number 6084 are 60

The nearest square number to 60 which does not exceed 60 is 7^{2}

Hence, the required answer must be either 72 or 78.

Now, we know that 75^{2} = 5625

The required answer must be more than 75.

The square root of 6084 will be 78.