Question 112
Solve the following question:
Find the decimal fraction, which when multiplied by itself, gives 84.64.
Let the decimal fraction be x.
When a decimal fractions is multiplied by itself, then product =x×x=x2 [given]
But product = 84.64
∴x2=84.64
⇒x=√84.64
Now, place the bar over the numbers, then square root is given below.
9.29¯84.¯64811823643640
∴x=√84.64=9.2
Hence, the required decimal is 9.2.