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Question

The square root of 4.2025 is


A

2.05

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B

2.15

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C

2.25

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D

2.35

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Solution

The correct option is A

2.05


Here 4.2025 can be written as 4202510000

Now, square-root of this will be equal to 4202510000

= 41×41×5×510×10××10×10 (Using prime factorizaion method)

= 41×510×10

= 2.05


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