यदि (𝒂+𝒃)2 = 100 और a:b =1:3 हैं, तो 𝒂𝒃 ज्ञात करें।

  • 1

    10

  • 2

    14.50

  • 3

    18.75

  • 4

    20.50

Answer:- 3

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