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Question

Question 112

Solve the following question:

Find the decimal fraction, which when multiplied by itself, gives 84.64.


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Solution

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.


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