Evaluate . Round your answer to the nearest whole number.

The correct answer is: 8

GIVEN-
Given number = √72
TO FIND-
Solution of √72 (rounded off to the nearest whole number).
SOLUTION-
   √72 = √(6 * 6 * 2)
∴ √72 = √(6 * 6) * √2 …............. (√mn = √m * √n)
∴ √72 = 6 * √2 ........................... (√m*m = m)
∴ √72 = 6 * 1.414 ...................... (Refer image attached below for the long square division to find √2)

∴ √72 = 8.484
∴ √72 ≈ 8 .......................... (Rounding down to the nearest whole number because the digit after decimal point is <=5)
FINAL ANSWER-
Option 'c' i.e. '8' is the correct answer to the given question.