a:b = 4:7 এবং b:c = 35:42 হলে a:b:c এর মান কোনটি?

A 4:7:5

B 5:6:7

C 20:35:42

D 20:30:37

Solution

Correct Answer: Option C

a:b = 4:7 = 20:35
b:c = 35:42
∴ a:b:c = 20:35:42

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