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If the diagonals of two squares are in the ratio of 2 : 5, their area will be in the ratio of

A2:5\sqrt{2} : \sqrt{5}

B2 : 5

C4 : 25

D4 : 5

Answer:

C. 4 : 25

Read Explanation:

Let diagonals be 2x and 5x.

A1A2=12×(2x)212×(5x)2=425\frac{A1}{A2}=\frac{\frac{1}{2}\times{(2x)^2}}{\frac{1}{2}\times{(5x)^2}}=\frac{4}{25}

=> 4 : 25


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ഒരു വൃത്തത്തിന്റെ ആരം 4 സെ.മീ. ആയാൽ വ്യാസം എന്ത്?