8th Class Mathematics Squares and Square Roots Question Bank Square and Square Roots

  • question_answer If\[\sqrt{2}=1.414,\sqrt{3}=1.732\]and\[\sqrt{5}=\mathbf{2}.\mathbf{236}\], then find the value of, \[\sqrt{\frac{800}{45}}\]

    A)  5.214              

    B)  4.216

    C)  4.214                          

    D)  5.216

    Correct Answer: B

    Solution :

    (b) \[\sqrt{\frac{800}{45}}=\sqrt{\frac{2\times 400}{9\times 5}}=\frac{\sqrt{2}}{\sqrt{5}}\times \frac{20}{3}\] \[=\frac{1.414}{1.732}\times \frac{20}{3}=4.216\]            

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