If the area of a square increase by 69%, then side of the square increases by ---

If the area of a square increase by 69%, then side of the square increases by --- Correct Answer 30%

It is best to back calculation from the answer.For 13% increse in side, area increases = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>13</mn><mo> + </mo><mn>13</mn><mo> + </mo><mfrac><mrow><mn>13</mn><mo>&#xD7;</mo><mn>13</mn></mrow><mn>100</mn></mfrac><mo> = </mo><mn>27</mn><mo>.</mo><mn>69</mn><mo>%</mo></math>For 29% " " " " " " = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>29</mn><mo> + </mo><mn>29</mn><mo> + </mo><mfrac><mrow><mn>29</mn><mo>&#xD7;</mo><mn>29</mn></mrow><mn>100</mn></mfrac><mo> = </mo><mn>66</mn><mo>.</mo><mn>41</mn><mo>%</mo></math>For 30% " " " " " " = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>30</mn><mo> + </mo><mn>30</mn><mo> + </mo><mfrac><mrow><mn>30</mn><mo>&#xD7;</mo><mn>30</mn></mrow><mn>100</mn></mfrac><mo> = </mo><mn>69</mn><mo>%</mo></math>
Bissoy MCQ

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