Question

if square root f 81-9 then root of 0.81+root of 0.0081 is equal to

Answer 1

The correct answer is = 0.09

Explanation of the answer :  

note that, 0.0081 is nothing but 81 / 10000

Now, √81 / 10000 will give us √81 / √10000

That is equal to 9 / 100 because √81 = 9 and √10000 = 100  

Therefore, 9 / 100 = 0.09 which is the appropriate answer.