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Square root and cube root

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  1. √1296 / ? = ? / 2.25
    1. 6
    2. 7
    3. 8
    4. 9
Correct Option: D

Let , √1296 / N = N / 2.25
Then, 36/N = N /2.25 or N2= 36 x 225/100
∴ N = √(36 x 225) /100 = (6 x 15) / 10 = 9


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