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If a : b = 2 : 3 and b : c = 2 : 3, then...

If a : b = 2 : 3 and b : c = 2 : 3, then what is the value of `(3a^2+b^2-c^2):(a^2+2b^2-c^2)` ?
यदि a : b = 2 : 3 है तथा b : c = 2 : 3 है, तो `(3a^2+b^2-c^2):(a^2+2b^2-c^2)` का मान क्या होगा ?

A

`3 : 5`

B

` 4 : 5 `

C

`5 : 7`

D

`3 : 7`

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