a ∶ b = 2 ∶ 3 மற்றும் b ∶ c = 4 ∶ 7 எனில், 2a ∶ 3b ∶ c என்றால் என்ன?

1
2 ∶ 3 ∶ 14
2
8 ∶ 36 ∶ 21
3
16 ∶ 36 ∶ 21
4
8 ∶ 12 ∶ 21

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