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a:b =4:7 & b:c=5:6 হলে a:b:c =?

a:b =4:7 & b:c=5:6 হলে a:b:c =? Correct Answer 20:35:42

a : b = 4 : 7 b : c = 5 : 6 a : b : c = ( 4 × 5) : ( 7 × 5) : ( 6 × 7) = 20 : 35 : 42

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