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Question

Question 111

Solve the following question:

A decimal number is multiplied by itself. If the product is 51.84, then find the number.


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Solution

Let the number be x. Then, product =x×x=x2
But product = 51.84 [given]
x2=51.84
x=51.84
Now, place the bar over the numbers, then square root is given below.
7.27¯51.¯84491422842840

x=51.84=7.2
Hence, the required number is 7.2.


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