यदि  𝑎:𝑏=2:3 तथा 𝑏:𝑐= 4:5 हो, तो (𝑎+𝑏):(𝑏+𝑐) =?

  • 1

    3:4

  • 2

    4:3

  • 3

    20:27

  • 4

    27:20

Answer:- 3

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